TR0001-SP020513T H F • C t T Y • O F
ADDENDUM NO.1
MAY 13, 2002
for
TRAFFIC SIGNAL INSTALLATION
Natches Trace at Denton Tap Road
Project # TR 00 -01
Plans and specifications for the installation of a Traffic Signal at Natches Trace
and Denton Tap Road, Project No. TR 00 -01 for the City of Coppell, Texas, on
which bids are to be received in the Purchasing Office at the City of Coppell
Town Center, 255 Parkway Boulevard, until 10:00 a.m., May 20, 2002, are hereby
modified as follows:
On May 13, 2002 a pre -Bid conference was held on the referenced project. Based on
discussion at the Pre -Bid Conference, Addendum No. 1 is being issued.
Remove pages 1 -18 through 1 -28 of the Bidding Documents and replace with
pages 1 -18 through 1 -30. The changes include the following:
a. 1" PVC Conduit - Trenched (item I -1);
b. Signal Cable - 7 Conductor #14 AWG (item I -9);
c. Clarification on the Controller Foundation as being 24 inches above ground
(item I -18);
d. Clarification on the City supplied signal poles and mast arms that they are to
be installed by the contractor and that they will be delivered to the site
prepainted. The bid item has been changed to reflect those comments and also
to provide an opportunity for the contractors to provide a bid price on the
installation (items I -19, 1-20,1-21, and I -22);
e. Inclusion of Pedestrian Signal Assembly 2 Indication (item I -26);
f. Inclusion of PED Push Button (item I -27);
g. Inclusion of Detector Lead -in Cable - 2 Conductor #14 AWG (item I -12);
h. Inclusion of Loop Detector Installation, saw cut and wired (item I -13);
i. Inclusion of Digital Loop Detector Vehicle Detection 2 Channel (item I -14);
In all, seven additional bid items were added causing item numbers to change on all
previous items.
2. Page 6 -31, paragraph 7.0, Finish - on the thirteenth line change the word "cost" to
"coat ".
3. Page 6 -36, paragraph 6.0 Reflectors — in the heading change the word "No" to
"Not"
4. Page 6 -39, paragraph 14.1 — on the fifth line change the word "Heads" to
"Sections ".
5. Page 6 -58, paragraph 12.4.1 — on the third line change the 3 /8ths to 5 /8ths.
6. During the printing of the specifications four pages were omitted. Those pages
were 5 -11, 6 -28, 6 -62, and 6 -64. Those four pages are included with this
addendum.
7. Include specifications entitled "Vehicle and Pedestrian Detectors; Detector
Amplifiers; Lead -in Cable; Pedestrian Push Buttons; Installation Procedures" in
the Technical Specifications & Description of Pay Items as pages 6 -66 through 6-
72.
8. Construction Plans Sheet 3 of 4 - the conduit for the power source from the
handhold to the controller should be a two -inch PVC.
9. Construction Plans Sheet 4 of 4 -in the conduit and cable quantities and the
conductor and cable summary the lead -in cable should be a #14 not a #12.
10. Bidders shall acknowledge receipt of Addendum No. 1 in the space provided in
the Proposal, on the outer envelope of their bid and by faxing back the
"Transmittal of Addendum Acknowledgement Sheet' to the City of Coppell
Purchasing Department at (972) 304 -3645.
TRAFFIC SIGNAL INSTALLATION
Natches Trace at Denton Tap Road
Project # TR 00 -01
UNIT PRICE BID SCHEDULE
SECTION I
Item
Quantity
Unit
Description and Price in Words
Unit
Total
No.
Price
Price
I-1
66
LF
I" PVC Conduit— Trenched
Complete in Place
Dollars
and Cents
per LF..
I -2
790
LF
2" PVC Conduit — Trenched
Complete in Place
Dollars
and Cents
per LF..
I -3
81
LF
2" PVC Conduit — Bored
Complete in Place
Dollars
and Cents
per LF.
I -4
116
LF
3" PVC Conduit —Bored
Complete in Place
Dollars
and Cents
per LF.
I -5
66
LF
3 Conductor #6 XHHW
Complete in Place
Dollars
and Cents
per LF.
I -6
675
LF
Electrical Condtr. #8 XHHW
Complete in Place
Dollars
and Cents
per LF.
1-18 Bidding Documents
TRAFFIC SIGNAL INSTALLATION
Natches Trace at Denton Tap Road
Project # TR 00 -01
UNIT PRICE BID SCHEDULE
SECTION I
Item
No.
Quantity
Unit
Description and Price in Words
Unit
Price
Total
Price
1 -7
635
LF
Signal Cable - 16 Conductor
#12 AWG
Complete in Place
Dollars
and Cents
per LF.
1 -8
521
LF
Signal Cable - 5 Conductor
#14 AWG
Complete in Place
Dollars
and Cents
per LF.
I -9
264
LF
Signal Cable — 7 Conductor
#14 AWG
Complete in Place
Dollars
and Cents
per LF.
781
LF
Opticom Cable - 3 Conductor
I -10
#18 AWG
Complete in Place
Dollars
a nd Cents
per LF.
EA
3M Opticom Detector
I -11
4
Complete in Place
Dollars
and Cents
per EA.
1 -19 Bidding Documents
TRAFFIC SIGNAL INSTALLATION
Natches Trace at Denton Tap Road
Project # TR 00 -01
UNIT PRICE BID SCHEDULE
SECTION I
Item
Quantity
Unit
Description and Price in Words
Unit
Total
No.
Price
Price
I -12
5609
LF
Detector Lead -in Cable — 2
Condtr. #14 AWG
Complete in Place
Dollars
and Cents
per LF.
I -13
1237
LF
Loop Det. Installation
(saw cut & wired)
Complete in Place
Dollars
and Cents
per LF.
I -14
6
EA
Digital Loop Det.Vehicle Det. 2
Channel
Complete in Place
Dollars
and Cents
per EA.
I -15
1
EA
Naztec TS2, Type 2 Controller,
Model #980 w /Cabinet & Access.
Complete in Place
Dollars
and Cents
per EA.
I -16
26
LF
Foundation Type 30 -B
(including casing)
Complete in Place
Dollars
per LF.
1 -20 Bidding Documents
TRAFFIC SIGNAL INSTALLATION
Natches Trace at Denton Tap Road
Project # TR 00 -01
UNIT PRICE BID SCHEDULE
SECTION I
Item
Quantity
Unit
Description and Price in Words
Unit
Total
No.
Price
Price
I -17
30
LF
Foundation Type 36 -A
(including casing)
Complete in Place
Dollars
and Cents
per LF.
I -18
1
EA
Controller Foundation as per
TxDOT Dallas District Standards
(24" Above Ground)
Complete in Place
Dollars
and Cents
r EA.
1 -19
1
EA
Installation of City Supplied
Prepainted Signal Pole
w/44' Mast Arm
Complete in Place
Dollars
per EA.
I -20
1
EA
Installation of City Supplied
Prepainted Signal Pole
w /40' Mast Arm
Complete in Place
Dollars
and Cents
per EA.
1-21 Bidding Documents
TRAFFIC SIGNAL INSTALLATION
Natches Trace at Denton Tap Road
Project # TR 00 -01
UNIT PRICE BID SCHEDULE
SECTION I
Item
Quantity
Unit
Description and Price in Words
Unit
Total
No.
Price
Price
I -21
1
EA
Installation of City Supplied
Prepainted Signal Pole
w/35' Mast Arm
Complete in Place
Dollars
per EA.
I -22
1
EA
Installation of City Supplied
Prepainted Signal Pole
w /30' Mast Arm
Complete in Place
Dollars
per EA.
I -23
44
EA
Traffic Signal Sections 12"
Complete in Place
Dollars
and Cents
per EA.
I -24
8
EA
Traffic Signal - 3 Section Head
Backplate
Complete in Place
Dollars
and Cents
per EA.
I -25
4
EA
Traffic Signal — 5 Section Head
Backplate
Complete in Place
Dollars
and Cents
per EA.
1 -22 Bidding Documents
TRAFFIC SIGNAL INSTALLATION
Natches Trace at Denton Tap Road
Project # TR 00 -01
UNIT PRICE BID SCHEDULE
SECTION I
Item
Quantity
Unit
Description and Price in Words
Unit
Total
No.
Price
Price
1 -26
8
EA
Pedestrian Signal Assembly 2
Indication
Complete in Place
Dollars
and Cents
per EA.
I -27
8
EA
PED Push Button
Complete in Place
Dollars
and Cents
per EA.
I -28
1
EA
Service Meter Installation
Complete in Place
Dollars
and Cents
per EA.
I -29
4
EA
Type A Ground Pull Box
Complete in Place
Dollars
and Cents
per EA.
1 -23 Bidding Documents
TRAFFIC SIGNAL INSTALLATION
Natches Trace at Denton Tap Road
Project # TR 00 -01
UNIT PRICE BID SCHEDULE
SECTION I
Item
Quantity
Unit
Description and Price in Words
Unit
Total
No.
Price
Price
I -30
1
EA
Type C Ground Pull Box
Complete in Place
Dollars
and Cents
per EA..
I -31
1
EA
Upload/Download Device
Complete in Place
Dollars
and Cents
per EA.
I -32
1
EA
Intersection Display Panel/Board
Complete in Place
Dollars
and Cents
per EA.
I -33
158
LF
Pavement Marking - 24" Solid
White Line
Complete in Place
Dollars
and Cents
per LF.
1 -34
125
LF
Pavement Marking
"Puppy Tracks"
Complete in Place
Dollars
and Cents
r LF.
1 -24 Bidding Documents
TRAFFIC SIGNAL INSTALLATION
Natches Trace at Denton Tap Road
Project # TR 00 -01
UNIT PRICE BID SCHEDULE
SECTION I
Item
Quantity
Unit
Description and Price in Words
Unit
Total
No.
Price
Price
I -35
2
EA
Traffic Sign — R -3
Lane Use Sign/Dual Lefts
Complete in Place
Dollars
and Cents
r EA.
I -36
0
EA
Traffic Sign - R4 -7
Keep Right Sign
Complete in Place
Dollars
and Cents
er EA.
I -37
1
EA
Traffic Sign — W3 -3
Signal Ahead Sign
Complete in Place
Dollars
and Cents
per EA.
1 -38
4
EA
Street Name Sign D -3
on Mast Arm
12" Letters/18" Blade
Complete in Place
Dollars
and Cents
per EA.
1 -25 Bidding Documents
TRAFFIC SIGNAL INSTALLATION
Natches Trace at Denton Tap Road
Project # TR 00 -01
UNIT PRICE BID SCHEDULE
SECTION I
TOTAL BID ITEMS I -1 thru I -38
TANGIBLE PERSONAL PROPERTY COST $
1 -26 Bidding Documents
BID SUMMARY
*CALENDAR
TOTAL PRICE DAYS
TOTAL BID ITEMS BASE BID I -1 thru I -38
In Words:
* NOTE: Traffic Liaht must be operational by Aueust 19, 2002.
6. BIDDER agrees that all Work awarded will be completed within Calendar
Days. Contract time will commence to run as provided in the Contract Documents and as
per Section 8 of the Bidding Documents.
7. Communications concerning this Bid shall be addressed to the address of BIDDER indicated
on the applicable signature page.
8. BIDDER understands that the Owner is exempt from State Limited Sales and Use Tax on
tangible personal property to be incorporated into the project. Said taxes are not included in
the Contract Price (see Instructions to Bidders).
9. The terms used in this Bid which are defined in the General Conditions of the Construction
Contract included as part of the Contract Documents have the meanings assigned to them in
the General Conditions.
The City of Coppell reserves the right to delete any portion of this project as it may deem necessary
to stay within the City's available funds. Should the City elect to delete any portion, the contract
quantities will be adjusted accordingly.
SUBMITTED ON
Signature:
1 -27 Bidding Documents
BID AFFIDAVIT
The undersigned certifies that the bid prices contained in this bid have been carefully reviewed and
are submitted as correct and final. Bidder further certifies and agrees to furnish any and/or all
commodities upon which prices are extended at the price offered, and upon the conditions contained
in the Specifications of the Invitation to Bid. The period of acceptance of this bid will be ninety (90)
calendar days from the date of the bid opening.
STATE OF COUNTY OF BEFORE
ME, the undersigned authority, a Notary Public in and for the State of , on this day
personally appeared who after being by me
Name
duly sworn, did depose and say:
"I
Name
Name of Firm
foregoing on behalf of the said
am a duly authorized office /agent for
and have been duly authorized to execute the
Name of Firm
I hereby certify that the foregoing bid has not been prepared in collusion with any other Bidder or
individual(s) engaged in the same line of business prior to the official opening of this bid. Further, I
certify that the Bidder is not now, nor has been for the past six (6) months, directly or indirectly
concerned in any pool, agreement or combination thereof, to control the price of services/
commodities bid on, or to influence any individual(s) to bid or not to bid thereon."
Name and Address of Bidder:
Telephone: ( ) by:
Title: Signature:
SUBSCRIBED AND SWORN to before me by the above named
on this the day of
2002.
Notary Public in and for the State of
1 -28 Bidding Documents
If BIDDER IS:
An Individual
By
doing business as
Business address
(Individual's Name)
IM
A Partnership
B y
(Firm Name)
(General Partner)
Business address
Phone No.
A Corporation
By
(Corporation Name)
(State of Incorporation)
(Name of person authorized to sign)
(Title)
(Corporate Seal)
Business address
(Secretary)
No.
A Joint Venture
By
(Name) (Address)
By
(Name) (Address)
(Each joint venture must sign. The manner of signing for each individual, partnership and corporation that is a partner to
the joint venture should be in the manner indicated above.)
1 -29 Bidding Documents
PREVAILING WAGE RATES
The City of Coppell is the contracting agency for this project. The following statue requires any
contracting agency to specify the generally prevailing rate of wages in contracts that are bid.
Vernon's Texas Civil Statutes -Article 5159a:
"Construction of Public Works in
State and Municipal or Political Subdivisions;
Prevailing Wage Rate to be Maintained. "
Air Tool Operator . ............................... 9.00
Asphalt Raker ..... ...............................
9.55
Asphalt Shoveler .. ...............................
8.80
Batching Plant Weigher ........................11.51
Crane, Clamshell, Backhoe,
Carpenter .......... ...............................
10.30
Concrete Finisher - Paving ......................10.50
Foundation Drill Operator Crawler Mounted.....
Concrete Finisher - Structures ...................
9.83
Concrete Rubber .. ...............................
8.84
Electrician .............. ..........................15.37
Milling Machine Operator ...........................
Flagger.................. ........................... 7.55
Form Builder - Structures ........................
9.82
Form Liner - Paving and Curb ..................
9.00
Form Setter - Paving and Curb ..................
9.24
Form Setter - Structures .........................
9.09
Laborer - Common . ...............................
7.32
Laborer - Utility .... ...............................
8.94
Mechanic .......... ...............................
12.68
Oiler............... ...............................
10.17
Servicer ............ ...............................
9.41
Painter - Structures ...............................
11.00
Pipe Layer ......... ...............................
8.98
Blaster ............. ...............................
11.50
Asphalt Distributor Operator ..................10.29
12.00
Asphalt Paving Machine .....................
10.30
Broom or Sweeper Operator ....................
8.72
Bulldozer ........ ...............................
10.74
Concrete Curing Machine ......................
9.25
Concrete Finishing Machine ..................
11.13
Concrete Paving Joint Machine ...............10.42
8.965
Concrete Paving Joint Sealer ..................
9.00
Truck Driver Lowboy/Float ...................
10.44
Truck Driver- Transit Mix ......................
9.47
Truck Driver- Winch ............................
9.00
Vibrator Operator -Hand Type ..................
7.32
Welder ............ ...............................
11.57
Concrete Paving Saw . ...............................
10.39
Concrete Paving Spreader . ..........................10.50
Slipform Machine Operator ..........................
9.92
Crane, Clamshell, Backhoe,
Derrick, Dragline, Shovel ...........................
11.04
Foundation Drill Operator Crawler Mounted.....
10.00
Foundation Drill Operator Truck Mounted .......
11.83
Front End Loader ...... ...............................
9.96
Milling Machine Operator ...........................
8.62
Mixer ................... ...............................
10.30
Motor Grader Operator Fine Grade ...............
11.97
Motor Grade Operator ...............................
10.96
Pavement Marking Machine .........................
7.32
Roller, Steel Wheel Plant -Mix Pavements .........
9.06
Roller, Steel Wheel Other Flatwheel or
Tamping.......... ...............................
8.59
Roller, Pneumatic, Self - Propelled ..................
8.48
Scraper................... ...............................
9.63
Tractor - Crawler Type ...............................
10.58
Tractor - Pneumatic ..... ...............................
9.15
Traveling Mixer ........ ...............................
8.83
Wagon - Drill, Boring Machine .....................
12.00
Reinforcing Steel Setter Paving ....................
13.21
Reinforcing Steel Setter Structures ................
13.31
Steel Worker- Structural ............................
14.80
Spreader Box Operator ..............................
10.00
Work Zone Barricade .. ...............................
7.32
Truck Driver - Single Axle Light .....................
8.965
Truck Driver - Single Axle Heavy ....................
9.02
Truck Driver -Tandem Axle Semi Trailer .........
8.77
1 -30
Bidding Documents
VEHICLE AND PEDESTRIAN DETECTORS;
DETECTOR AMPLIFIERS; LEAD -IN CABLE; PEDESTRIAN
PUSH BUTTONS; INSTALLATION PROCEDURES
1.0 GENERAL
This specification covers minimum design and functional requirements of
electronic loop detector amplifiers, lead -in cable for loop detectors, pedestrian
detector push buttons, and the installation requirement for detector components
within a traffic signal system.
2.0 LOOP DETECTOR AMPLIFIER
2.0.1 All loop detector units supplied for this project shall meet the latest NEMA
requirements.
2.0.2 The loop detector units provided shall be digital. solid state devices designed for 120
VAC operation and stand alone shelf mounting.
2.0.3 The loop detector units shall be dual channel units and operate in three modes - delay,
extension, and normal.
2.0.4 The loop detector unit shall also provide the following features:
"Failsafe" open loop recognition responds to broken loop/lead -in connections with a
continuous call and indication.
"Remote Reset" is a ground level signal which resets presence indications of
suspicious calls. Open loop memory shall not be lost, and an open loop indication
cannot be reset.
"Open Loop Test" feature allows the detector to continue to operate on intermittently
open loop systems. A momentary open (broken wire, poor splice, loose connections)
will be stored in memory.
2.1 Functional Requirements
2.1.1 The unit shall be capable of detecting presence of any vehicle with a metal mass,
stopped or moving at speeds up to 80 MPH within the detection zone of an induction
loop.
2.1.2 Detection shall be purely electronic and shall respond to a change of inductance of the
loop caused by the presence of a vehicle in the field of influence of the loop.
6-66 Technical SpecUlcadons &
Description of Pay Items
2.1.3 Inductive tuning to loops of various configurations shall be automatic, the unit
accommodating loop circuits in the range of 0 to 2000 microhenries. Tuning controls
of any kind of this function will not be acceptable.
Each unit or detection channel shall be self tuning on initial turn -on and self returning
within 10 seconds of reactivation or restoration of electrical power.
2.1.4 In each unit or detection channel the method of measurement shall be crystal
referenced digital period counting. Multiple channels within the same unit shall
operate on a sequential scanning basis, that is, only one channel per unit shall be
active at any point in time.
2.1.5 Each unit or detection channel shall be capable of operation in one of two front panel
switch selectable modes:
a. Pulse Mode - A vehicle passing over the loop shall cause a programmable
output pulse of from 15 to 236 millisecond duration. In this mode the detector
shall rephase 2 seconds after initiation of the above described output pulse.
The rephase sequence shall allow detection of the smallest detectable vehicle,
three seconds subsequent to detection of a stopped automobile in the loop
field.
b. Presence Mode - Continuous output based on continuous occupancy of the
loop field. Minimum hold time for smallest detectable vehicle shall be four
minutes. Hold time for automobiles shall be no more than 120 minutes and no
less than 60 minutes with a 3 turn compact loop and minimum cable lead -in.
2.1.6 At least three (3) front panel switch selectable levels of sensitivity shall be provided in
each unit or detection channel, for each mode described in paragraph 2.1.5. Sensitivity
range shall be adequate to detect both the smallest and the largest detectable vehicles
stopped or passing over various loop configurations, with lead -in cable length up to
1000 feet.
2.1.7 "Channel active" indicator lamps, front panel - mounted shall be provided for each
detection channel, and shall be visible in bright sunlight. Each detection channel shall
be provided with a front panel - mounted "off' switch for deactivation, and a "write -on"
pad for traffic movement association identification.
2.2 Electrical Requirements
2.2.1 Detector amplifier units shall be either of the two types described below. Type
determination shall be based on practical application and space utilization within the
controller cabinet.
a. Shelf - mounted, self - powered units shall include two detection channels and
operate on input voltage from 95 VAC to 135 VAC, (Power supply contained
6.67 Technical Specicadons &
Description of Pay Items
in unit). Single channel units shall interface with a 10 -pin (MS- 3106A18 -1S)
mating connector. Dual channel units shall interface with one 19 -pin (MS-
3106A2214S) or two 10 -pin (MS- 3106A18 -1S) connectors. Varistors between
power line leads shall be provided to limit peak transient voltage to 270 VDC.
2.2.2 Each detection channel shall be provided with an isolated output circuit such that
detection is indicated in a conductive state by either: (a) An output relay (250 V @ IA
or 28 V @ 2A resistive load), (b) An optically isolated Darlington transistor (30 VDC
@ 50 MA). Selection of one of the above output options shall be based on practical
application to the type of signal controller used.
2.2.3 Operation of detection channel shall not terminate if loops are defective through either
single point leakage to ground, or short to ground.
2.2.4 Circuitry in the detection channel shall be such that output response to an open loop is
selectable as either a detection or "no detection ".
2.2.5 Each detection channel shall have circuit board programming capability to modify
performance for particular applications as follows:
a. Pulse Mode: Output duration of pulse shall have for programmable nominal
values of 15, 19, 118 and 236 milliseconds.
b. Presence Mode: Gradual adapt hold time shall be programmable such that an
automobile on a 3 -tum 6'x 6' loop will be held in one of three ranges; 1/2 to 1
hour, 1 to 2 hours or 2 to 4 hours.
2.2.6 Each detection channel shall be protected against lightning strikes. It shall be capable
of withstanding the discharge of a two (2) microfarad capacitor charged to 1000 volts
across the loop terminals and from each loop terminal to earth ground.
2.2.7 The detection system(s) shall operate properly at temperatures from -350EIF to +
165 ❑ F. and at relative humidity to 100 %.
2.3 Documentation
Each detector unit shall be provided with the following:
a. Complete and accurate schematic diagram(s).
b. Complete installation procedures.
c. Complete performance specifications, electrical and mechanical.
d. Complete parts list including names of vendors for parts not identified by
universal part numbers (JEDEC, RETMA or EIA).
6.68 Technical Specifications &
Description of Pay Items
e. Pictorial of component layouts or circuit board(s).
f. Maintenance and trouble shooting procedures.
g. Stage by stage theory of circuits and their operation.
2.4 Guaranty
If it is normal trade practice for the manufacturer to furnish a guarantee for the work
provided herein, the Contractor shall turn this guarantee over to the Engineer for
potential dealing with the guarantor. The extent of such guarantee will not be a factor
in selecting the successful bidder.
3.0 LOOP DETECTOR INSTALLATION
3.1 Description
3.1.1 This section specifies the Contractor's responsibility for loop vehicle detector
installation. This item shall govern for furnishing and placing of detector loops of all
configurations and dimensions shown on the plans, loop wire, attachments, loop
testing, and incidentals necessary to properly install detector loops.
3.2 Materials
3.2.1 Loop wire conductors shall be #12 AWG, soft drawn, stranded wire, Type THHW or
Type XHHW, rated for 600V.
3.2.2 Detector lead -in cable shall be a twisted 100% shielded pair of No. 14 AWG stranded
wire and a No. 16 AWG stranded drain wire in a chrome vinyl jacket. (Beldon 8720
or an approved equivalent shall be used).
3.3 Detector Loop Installation
3.3.1 The installation of loop detectors shall occur as indicated on the plans "Detector
Details."
3.3.2 The layout of the loop detector shall be performed by the Contractor in the presence of
the Engineer. The Engineer shall be notified in advance of installation at a particular
site location and will verify the spotting by the installation crew. In the event that it is
not possible for the Engineer to be available as specified above, the Contractor shall
proceed with the layout task. Detector loop locations relative to the back of curb as
shown on "Layout Plans" shall be maintained, unless written permission is received
from the Engineer.
6-69 Technical Specifications &
Description of Pay Items
3.3.3 Slots shall be cut in the roadway, as shown in the plans, into which the loop wire shall
be installed. The saw slots shall be cleaned thoroughly with clean dry air from an air
compressor. The saw slots shall be checked and cleared of any debris and jagged
edges before the loop wires are placed. The loop wires shall be placed in the saw cut
with a non -blunt object.
3.3.4 Slot sealant shall be a one -part formula, requiring no mixing, as Type 3M detector
loop sealant, or approved equal. All saw cuts must be of sufficient width and depth,
that all loop wire contained in the cut is completely encapsulated when the epoxy
sealant is poured.
3.3.5 Loop wire cable shall run continuously, without splicing from the ground box,
through the 1 to connecting conduit to the loop configuration in the pavement and
returned through the conduit to the ground box, for connection to lead -in cable.
3.3.6 The successive turns of loop wire for each different loop configuration is shown on
the "Detector Details." The two lead -in wires shall be twisted together to form a
symmetrically twisted pair. The loop lead -in shall be twisted a minim of five (5)
turns per foot.
3.3.7 Where two or more loop lead -ins enter a ground box, a minimum separation of one
(1) foot shall be maintained between loop leads underneath the pavement surface.
3.3.8 A minimum of 2" loop wire slack shall be provided at each expansion joint in the
concrete pavement.
3.3.9 The loop wires shall be connected to the detector lead -in cable in the pullbox adjacent
to the loop location. Each individual connection shall be a waterproof splice in which
the conductors are soldered and wire nutted. The drain wire in the lead -in cable shall
be left open a he splice and grounded at the cabinet terminals only, unless other is re c
recommended y the detector manufacturer. The methods of reinsulating shall have a
dielectric strength at least equal to the original insulation. The specific method of
splicing shall be demonstrated to the Engineer for approval.
3.4 Detector Loop Testing
3.4.1 Prior to pouring the slot sealant, the loop shall be checked in the pullbox for continuity
and resistance. Series resistance shall not be more than 10 ohms. In addition, the
integrity of the insulation shall be checked by applying a megger between each end of
the loop lead -in and the nearest reliable electrical ground (e.g., street light, fire
hydrant, etc.). In the event that no available ground exists, a suitable ground shall be
established for the measurement (e.g., driven metal spike). The megger reading shall
not be less than 10 megohms under any condition. The Contractor shall document the
results of the megger test and submit documentation to the Engineer for approval.
Tests shall not be performed without prior notification of the Engineer.
6-70 Technical Specy7catlons &
Description of Pay Items
3.4.2 After the slot sealant has been placed and the detector lead -in cable has been spliced
to the loop wire and the spliced sealed, the Contractor shall repeat the tests as
described in Section 3.4.1 except that the tests shall be performed in the controller
cabinet. The Contractor shall document the results of this "after" test and submit
documentation to the Engineer for approval. If the loops do not meet the test
requirements, the Contractor shall find the cause for the test failing and correct the
fault to the satisfaction of the Engineer and retest the loop and lead -in all at the
expense of the Contractor.
4.0 PEDESTRIAN PUSH BUTTONS
Pedestrian push buttons, when required, shall be mounted 3' 6" above the ground
or sidewalk and shall be of the type that have permanent type signs within the
detector unit or signs permanently attached to the unit which explain the purpose of
the push buttons and indicates which crosswalk signal is actuated. Push buttons shall
be of the direct push contact type, entirely insulated from the case and be of
brass or other corrosion resistant material. The assembly shall be sturdy,
weatherproof and secure against electrical shock to the user. The case of the unit
shall be tapped for 1/2 inch pipe, for appropriate conduit connection.
4.1 The push button shall be activated by a minimum 1 1/4" convex plunger. A protective
shroud shall encircle the plunger to deter vandalism. The shroud shall be east as part
of the housing cover. The plunger shall protrude beyond the protective shroud a
distance adequate to accommodate the switch travel.
4.2 While staking the pole locations, the contractor along with the engineer shall verify
the location of the push buttons and the direction of the arrows on the signs prior to
installation.
5.0 MEASUREMENT AND PAYMENT
5.1 Loop Detector Amplifiers
Loop detector amplifiers will be measured per each (channel) unit. (Multi- channel
amplifiers measured per each channel). Loop detector amplifiers, installed in place,
will be paid for at the unit prices bid as specified in the bid item list. Said payment
shall be full compensation for famishing and installing amplifier unit including wiring
harnesses and required power supply, surge voltage protectors and for all labor, tools,
materials, equipment and incidentals necessary to complete the work.
5.2 Loop Detector Installation
Detector loops will be paid for at the unit price bid for "Detector Loop ", of the types
and sizes specified in the bid items. These prices shall each be full compensation for
furnishing and installing all detector loops, including marking locations of loops, saw
6-71 Technical Speccadons &
Description of Pay Items
cuts, loop wires, sealant, attachment devices, and for all labor, tools, equipment, and
incidentals as necessary to complete the work.
5.3 Detector Lead -in Cable
Detector lead -in cable will be paid for at the unit price bid for 'Detector Lead -in
cable, 2C #14 AWG" as shown in the plans. These prices shall be full compensation
for furnishing and installing all detector lead -in cable including the splicing and
testing and for all labor, tools, equipment, and incidentals as necessary to complete the
work.
5.4 Pedestrian Push Buttons
Pedestrian push buttons will be measured per each. Materials required and used in
installation, such as supplemental signs and mounting hardware shall not be paid for
directly, but shall be considered subsidiary to the Item 'Pedestrian Push Buttons ".
Pedestrian push buttons, installed in place, will be paid for at the unit prices bid as
specified in the bid item list. Said payment shall be full compensation for furnishing
and installing push buttons, supplemental use signs, and for all labor, tools,
equipment, materials and incidentals necessary to complete the work.
6-72 Technical Specifications &
Description of Pay Items
a. Overlaps A through D - standard overlaps for special display left turns.
b. Overlaps E through H - additional overlaps available on output pins provided
by otherwise unused pedestrian load switch positions or other appropriate
arrangement as approved by the engineer.
Coordination Requirements
Each controller shall be delivered with a four (4) cycle, four (4) split, and three (3) offset time
base coordinator contained internally within the timer unit, and be delivered complete with all
related auxiliary harnesses) wired into the cabinet, ready for operation.
Overlaps shall be keyboard programmable or programmed through an interchangeable plug -
in printed circuit board assembly.
The coordination program provided in these timers shall include the following features:
a. Cycle length adjustable at least from 30 to 255 seconds, with timing and offset
adjustments either in seconds or percent of cycle.
b. The ability to associate the sequence of each of the four (4) left turn phases
separately for each dial and split from the keyboard to be:
1 . Normal "leading" sequence (preceding the opposing thru phase);
2. "Trailing" sequence (following the opposing thru phase);
3. To occur twice per cycle, both "leading" and "trailing ";
4. To be omitted during a particular dial and split, with the calls from its
detector input being internally switched to the compatible thru phase
in the other ring when and only when the left turn phase is being
omitted.
The ability to associate the desired type(s) of left turn operation with each dial
and split combination from the keyboard shall be available for both internal
time base and external conventional hard wire system operation. The program
shall also include the capability to select these functions for "free" operation.
For each controller phase there shall be two (2) force -off points provided and
available for use in each coordination cycle, such that left turn phases on both
streets may be brought up twice per cycle (both "leading" and "trailing ") or
such that the main and side street phases may be brought up and forced off
twice per background cycle.
C. The coordination program shall feature automatic calculation and
implementation of the maximum width of the "permissive" period during
which late side street calls may still be serviced within any given background
cycle. Where time remaining in the background cycle permits, the
5-11 Genera! Notes do Specy7cadtons
All capabilities from the controller keyboard shall be capable remotely through a
computer interface through a communications modem connection.
2.12.3 The controller shall allow any of its detector inputs to be used with the system
operation. The system shall report volume and occupancy counts based on a user -
selectable time period for each detector. Storage of this data may take place at either
the local or master controller, as specified within TS -3.4.
6-28 Technical SpeclOcadons &
Description of Pay Items
RETROREFLECTIVE
PREFABRICATED PAVEMENT MARKINGS
SECTION 1.0 SCOPE OF WORK AND GENERAL CHARACTERISTICS
1.1 This specification shall govern the materials, composition, application,
measurement, and payment of pavement markings of the color, length
thickness, and width as specified in the Plans and in accordance with the lines
and positions shown on the Plans or as established by the Engineer. It is the
object of this specification to insure the installation of tightly adherent, defect -
free pavement markings of quality, visibility, and durability, to either asphaltic
or portland cement road surfaces. Markings to be installed on roadways under
traffic operation conditions shall be placed with a minim of interference to
the operation of the facility.
1.2 Pavement marking material shall be a beaded/pigmented film product
especially compounded for traffic markings. Each container or roll shall be
clearly and adequately marked to indicate color, weight, type of material, and
lot or batch number (a lot or batch shall be defined as each individual blend or
mix that produces a finished product ready for use).
1.3 The materials shall have the following characteristics:
a. When in place for use, the markings shall not be slippery when wet.
b. The material shall have adhesion to the surface sufficient to prevent
tearing, roll -back, shrinkage and lifting under all weather conditions.
C. When in place, the material shall not exhibit a tacky or sticky surface.
d. Cold ductility of the material shall permit movement of same with the
normal shifting of the road surface without chipping or cracking.
e. The markings shall retain their original color, dimensions, and
position (relative to surface) under normal traffic conditions at road
surface temperatures from O °C (+ 32 °F) to 70 °C (158 °F).
f. When applied, the film material shall be 0.012" thick and essentially
have a uniform cross section with uniform density and material quality
throughout the thickness. The material shall be 95 percent free of
voids and holes and virtually free of blisters.
g. Markings in place shall be reflectorized internally (premixed glass
beads imbedded in film). Texas Test Method Tex -828 -13 shall show
uniform retrodirective reflectance throughout the markings.
6-62 Technical Specifications &
Description of Pay Items
3.1.4 Apply marking material in accordance with manufacturers specific recommendations
making sure all edges are firmly adhered and no material is overlapping.
3.1.5 Tamp or roll the applied markings with a minimum 200 lb. load.
3.2 It is the intent of the equipment requirements specified above to insure the placement
of pavement markings meeting the requirements of this specification. All markings
placed that do not meet the requirements of this specification and fail to adhere to the
road surface properly shall be completely removed and replaced at the expense of the
Contractor.
4.0 CONSTRUCTION METHODS
4.1 a. The Contractor shall use a crew experienced in the work of installing
pavement markings and shall supply all the equipment and materials
necessary for the placement of the pavement markings.
b. The pavement marking material shall be applied within the material
temperature limits recommended by the supplier.
C. The pavement upon which the pavement markings are to be placed
shall be cleaned and prepared, to the satisfaction of the Engineer, prior to
placement of the markings.
d. Cleaning shall be by any effective method approved by the Engineer, that
completely and effectively removes contaminants, loose materials, and
conditions deleterious to proper adhesion. When blast cleaning is required
by the Plans or by the Engineer, the blast cleaning shall be done in
accordance with State of Texas Special Specification Item 'Blast
Cleaning." Portland cement concrete surfaces shall not be cleaned by
grinding.
e. Portland cement concrete surfaces shall be further prepared after cleaning
by complete sealing with a methylmethacrylate sealer or primer with an
adhesive or adhesion promoter, approved by the Engineer, prior to
placement of the markings. Methylmethacrylate sealers, adhesives, or
adhesion promoters shall match infrared spectra and/or other data of
approved materials of file at the Materials and Tests Laboratory in Austin,
Texas.
f. When deemed necessary by the Engineer, asphaltic' surfaces exhibiting
polished aggregate shall be primed with a sealer, adhesive, or adhesion
promoter meeting the requirements specified for sealers, adhesives, and
adhesion promoters to be used on portland cement concrete surfaces.
6-64 Technical Specy1cadons do
Description of Pay Items