ST9904-CS050419Major Investment
Study
April 19, 2005
Texas
Department
of ~an~port~t/on
FECIIN1CAL ( OMMITTEE
City of Colleyvill¢
City of Coppc[I
DFW Airport
MIS STilDY IEAM
IIDR Engineering, Inc
Communily Awareness Services
Engineering Management Services
Garcia & Assoc Engineering, Inc
} INTB
1 Ricks & Company
Kimtey Ilom & :\ssociatcs
NCTCOG
Mr. Kenneth Griffin, P.E.
Director of Engineering & Public Works
City of Coppell
P.O. Box 478
Coppell, TX 75019
Dear Mr. Griffin:
~lease bc advised that our next SH 114 / SH 121 Technical Committee Meeting
will convene on Monday May 2, 2005, at 10:00 a.m. As with previous
meetings, we will meet in Conference Room A, City of Grapevine City Hall. The
address is 200 South Main Street, Grapevine, TX.
This meeting will give us the opportunity to discuss the project status. Wc will
discuss preliminary traffic projections and potential enhancements to the
preliminary alternatives and bring you up to date on thc study schedule.
We hope that you will be able to attend this meeting and look fbrward to that
prospect. It' you have any questions or need additional information, please contact
me at (817) 370-6535.
Sincerely,
Curtis Hanan, PE
Project Manager
District Advanced Transportation Planning Director
TxDOT-Fort Worth District
Major
Investment Study
Technical Committee Meeting
City of Grapevine City Hall
200 South Main Street
Grapevine, Texas
AGENDA
Monday May 2, 2005
10:00 AM
Topic
Welcome and Introduction
Traffic Projections Update
Overall Alternatives Discussion
What's Next/Schedule
Discussion
Adjourn
Curtis Hanan TxDO T
Kevin St. Jacques WSA
Phil UIIman HDR
Curtis Hanan TxDO T
Curtis Hanan TxDO T
Schedule
5 rain
20 min
April 29, 2005
Mr. Curtis Hanan, P.E.
Project Manager
Fort Worth District
Texas Department of Transportation
2501 S.W. Loop 820
Fort Worth, Texas 76115-6868
Re:
S.H. 114/S.H. 121 "Funnel" Project
Contract 02-448P5002, WA#4
Dear Mr. Hanan:
As a first step in the preparation of the design traffic volumes for this projcct, we have addressed
the discrepancies betwccn volumes dcvelopcd by TxDOT TP&P and those in the travcl demand
modcl generated by the North Central Texas Council of Governments (NCTCOG), as describcd
in thc letter from NCTCOG to the "Funnel" Project Team dated June 21, 2004. The following is
our asscssment of each itemized issue and our recommended rcsolution.
'Fable 1. Traffic Segment Comparison
~c,~nlent
No.
1
Roadway Segment
SH 114 WB FR between
$outhlake Bvd & Kimball Av
NCTCOG
2025 Volume
23,700
TxDOT TP&P
2025 Volume
Rccommcnded
2025 Volume
40,500 24 ;..0f)~6~ ~,,
Traffic connts taken itl 2(i)05 by WSA reported 5,607 on the exit ramp ar~t 7,148 on the frontage
road adding to 11,438 on this section of frontage road. A 3% growth ov&r 20 years would result
in 20,400 vpd. The ramp is also anticipated to receivc approximatcly 4~()Q0~pd diverted from
the closed exit ramp at FM 1709, rcsulting itl a total of 24,400 vpd lbr this section of frontage
road. TxDOT appcars to be pro~jccting frontage road volumes into the future from a point before
the main lanes werc constructed.
ISc~nlell[ [
~o.
NCTCOG TxDOT TP&P Recommended
Roadway Segment 2025 Volume 2025 Volume 2025 Volume
22,200
SH 114 EB FRbet~cen
Kimball Ax' & Southlakc Bvd
39,700
Traffic counts taken m 2005 by WSA reported 5,110 on thc exit ramp and 8,175 on thc frontage
road adding to 13,285 on this section oCl¥ontagc road. A 3% growth over 20 years w'ould result
in approximately 21,000 vpd.
April 2 I, 20()5
Mr. Hanam P.E.
Pagc 2 of 5
NCTCOG ~ TxDOT TP&P Recommended
2025 Volnmc ] 2025 Volume 2025 Volmne
20,000 39,200 27,000
Traffic counts taken in 2005 by WSA reported 7,056 vpd on the of Framp. This ramp will receive
traffic fi'om the closed oft' ramp to FM 1709, currently at 15,130 vpd, tlnough some will also go
to thc off' ramp to Kimball. A 3.6% growth in this section over 20 years would result in
approximately 38,000 vpd. However, some traffic that would use tine ramp would also sue thc
managed lanes or use tine direct connector from SH 360 and will not be able to exit until
Kimball, so 7,000 vpd was diverted to thc Kimball offramp, resulting in a volume of 27,000 vpd
on this off ramp.
fSegment I Roadway Segment .
maiulane off ramp and SH 26
NCTCOG
2025 Volunne
24,700
TxDOT TP&P / Recommended
2025 VolumeI .2025 Volume
52,700 44,000
['his item is closely related to Item #3 abovc. Traffic counts taken upstream of the off ramp in
2005 by WSA reported 10,751 on the frontage road; a 3% growth over 20 years would result in
approximately 17,000 vpd. Adding tile 27,000 vpd from the off ramp, results in a frontage road
volume of 44,000 vpd approaclning tine intersection.
egnlent
No. Roadway Seg uc d
; I-SH 114 EB FR between
- ~ S11 26 and on ramp to Si{ 114
NCTCOG
2025 Volume
26,400
TxDOT TP&P
2025 Volume
46,500
Recommended
2025 Volume
44,000
This section of frontage road will carry traffic from thc closed on ramp from FM 1709 (15,000
vpd in 2005 less about 2,500 vpd diverted to thc Kimball on ramp) , the Main Street off ramp
(5,400 vpd in 2005), tile closed off ramp loop at SH 26 (4,084 in 2005), and some diverted local
traffic from thc changed DC ramp to WM D Tale (cst'd 1,500 vpd ill 2005). All this traffic
grown at 3% for 20 years results in 37,500 vpd in 2025. Some 9,800 vpd exit at the new loop
ramp to SH 26 and another 25300 ( 15,800 vpd in 2005 grown at 3% for 20 years) come onto the
service road from SH 26 to crate a volume of 53,000 vpd. However, some traffic that would use
the on ramp would also use the nmnagcd lanes or usc tile direct connector from SH 360 and will
not be able to cnler fi-om this ramp, so 9,000 vpd was diverted to fine Kimball on ramp, resulting
m an eastbound on ramp volume o[-32,000 and a maximum vohtme of 44,000 on thc frontage
road.
/\pti[ 21,2005
Mr. Hanam P.E.
Page 3 of 5
SeglllCllt '
Roadway Segment
SH l l4/SH 121 EB off ramp
from Loop 382 to lnt'l Pkwy
NCTCOG
2025 Volumc
I 1,900
TxDOT TP&P
2025 Volume
Recommended
2025 Volume
19,000 12,000
Traffic counts taken on the ramp in 2005 by WSA reported 5,500 vpd. DFW lnt'l Dr traffic is
forecast by NCTCOG to grow at 8.4% over 20 years (from 80,000 vpd counted in 2005 by WSA
to 215,000 vpd in 2025), bnt growth is heaviest to and from the north and east, less to and from
lhe west. G-rowth of this ramp volume at 8.4% per year would result in about 14,000 vpd, but a
more reasonable growth rate of 6% per year would result in a volunm of about 12,000 vpd.
Segmcnt~ [2 NCTCOG / TxDOT TP&P Recommended
~o. 1_ Roadway Segment ~025 Vohlmc 2025 Volume 2025 Volume
7 1SH/SH 121114mergenOrtbofSHtoBas114profrOmexit ~ 130,400 [ 108,500 121,000
This analysis rcquircs the examination of both directional rmnps and the directional splits of the
interchanges. The 2005 count by WSA for this highway segment is 92,600 vpd. Averaging the
significant growth of the DFW traffic (8.4%) with thc 3.6% growth of the Ski 121 traffic results
in approximately a 4.5% growth rate in this mixing section. When applied to this section, the
2025 traffic volume woukt be cslimated at about 175,000. Tbis traffic consists of two ramps
1. traffic from DFW and SH 121 headed for IH 635 and
2. traffic from SH 121, DFW and SH 114 headed forSH 121
(Note that thc ramp access ti'om WB Ski 114 to EB IH 635 is eliminated).
Examining thc lane balance issucs raised in Table 2, Item I, it appears that TP&P assigned too
much traffic to proceed westbound from SH 114 to SH 121/S}I 114 and not enongh to the north
on SH 121 and to ibc south to Int'l Pkxvy. Also, NCTCOG appears to have assigned to much
traffic to contiuuc on SH 121 and not enough onto IH 635.
[segmen~ Roadway Segment
No. [
8 SH 121 NB ofl:ramf~ to Bas
I Pro and Sandy Lake Rd
NCTCOG TxDOT TP&P Recommended
2025 Volume 2025 Volume 2025 Volume
15.000
19,700
14,300
Traffic counts taken on the ramp in 2005 by WSA repotlcd 7,600 vpd. No changes in overall
Iravel patterns are expected at this ramp, though there is anticipated to bo tbcused growth that
would be accessed by this ramp. Growth of Ibis rmnp volume at 5% per year would result in
about 15,000 vpd in 2025.
April 21, 2005
Mr. Hanan, P.E.
Page 4 of 5
Table 2. Traffic Movement Imbalances
tl Scgment ·
No. ]
Roadway Segment
i SH l14WBtoSH114,/121WB
I
] SH 114/121 EB to SH I14EB
*includes HOV
NCTCOG 'PP&P 2025
2025 Volume Volume
60,800 92,700
58,400* 71,400
Recommended
2025 Volume
71,000
71,000
Tile TP&P westbound SH 114 volumes appear to not send sufficient traffic north to SH 121 and
south to lnt'l Pkwy. NCTCOG sends 25,000 north and 25,000 south, compared to 16,000 north
and 12,000 south by TP&P. This 12,000 vpd difference would reduce the TP&P WB volumes to
about 71,000. The compliment movements fi'om north and south to EB SH 114 would be added
after this comparison point.
[ Seg,)ent I
I
Roadway Seg nc ~t
IH 635 WB east of Sl-I 121 intchg
IH 635 EB cast of SH 121 mtchg
NCTCOG
202~ ~olame
87,600
79,900
TP&P 2025
Volume
100,900
83,200
Recommelrdcd
2025 Volume
85,000
87,000
Traffic counts taken in 2005 by WSA reported 50,100 vpd WB and 51,200 EB on IH 635. A
3.5% growth in this section over 20 years would result in approximately 85,000 vpd WB and
87,000 vpd EB on IH 635. Thc movements should be reasonably balanced.
Segnlent
No.
3
Roadway Segmeut
I11 635 off ramp To Bass Pro Dr
Bass Pro on ramp to Dr IH 635
NCTCOG I TP&P 2025
2025 Volmne / Volume
6,200 / 5,700
10,400 · 11700
Recommended
2025 Volume
7,000
10,000
Traffic counts taken in 2005 by WSA reported 3,300 vpd on thc IH 635 off ramp to Bass Pro Dr.
and 5,000 vpd on the Bass Pro ramp to IH 635. A 5% growth in this section over 20 years would
result in approximately 7,000 vpd on the Bass Pro offramp and 10,000 vpd on the on ramp from
Bass Pro Dr. The imbalance in movements is reasonable due t the difference in choices to access
and egress tbe Grapevine Mills Mall development.
Segment ~ NCTCOG TP&P 2025 IRcc°mmcnded
No. t Roadway Segment ~20~5 yolume Volume [ 2025 Volume
SH 114/121 EBtolnt'lPkw'y ~ 1, ;00 07000 [" 12,66~
4 [ lnt'l plwy to SH 114/121 WB } 12,000 111500 ~ 12,000
The TP&P volume of 19,000 would be reduced to 12,000 as discussed in Table 1 Item #6.
Traffic counts taken on thc ramp in 2005 by WSA reported 5,500 vpd. DFW lnt'l Dr traffic is
at 8.4 over 20 years (from 80,000 vpd counted in 2005 by WSA
lbrecast by N('TCOG to grow' ''/
April 21, 2005
Mr. }lanan, P.E.
Page 5 of 5
to 215,000 vpd in 2025), but growth is heaviest to and from the north and east, less to and from
lhe west. Growth of this ramp volume at 8.4% per ycar would result in about 14,000 vpd, but a
more reasonable growth rate of 6% per year would result in a volume of about 12,000 vpd.
Segment
No.
Roadway Segment
SH 114/121WB split to SH 114 I 64~900
SHl14EBmcrgctoSH114/12! ( 62,100
NCTCOG [ TP&P 2025
2025 Volume Volume
rs,300
_ 63,000
This was an improperly selected comparison, as thc ramp volumes to and from Wm D. Tate Dr
must be properly considered. A comparison xvas selected that eliminated the ramps for WM D.
Tatc Dr and for Main Street and incorporating tbe HOV volumes, and is restated as follows:
Scement ~ , I NCTCOG
Roadway Segment 2025 Volume
T T [SH 114-/121WB spilt t0 SFI 114 77,600
> rex,' cl SH 1 !4 EB merge to Sll 114/121 77,400
TP&P 2025
Volume
88,200
83,100
Recommended
2025 Volume
80,000
80,000
Thc NCTCOG volumcs are very closcly balanced, whilc thc TP&P volumes arc ~vithin reason.
The various changes in the individual comparisons above will result in modified overall traffic
volumes in thc entire corridor.
These are thc rcsolutions of thc differences of opinion voiced by NCTCOG in June 2004. We
will be conrpiling thc results oF these recommended modifications and subnritting them for
review by both TP&P and NCTCOG. After concurrence with thcsc modifications by thcse two
partics, we will complete the preparation of thc design tratlic volumes for the project.
Sinccrcly,
WILBUR SMITH ASSOCIATES
Kevin St. Jacques, P.E., P.T.O.E.
Associate-in-Charge, Dallas