Riverchase(3)-SY 860901 TRAFFIC IMPACT ANALYSIS
FOR
RIVERCHASE
IN
COPPELL, TEXAS
SEPTEMBER 1986
NDM NATHAN D. M^IER
CONSULTING ENGINEERS. INC.
Dallas, Texas
T~LE OI~ CONTENT~
I. INTRODUCTION
II. SITE ACCESS
III. INTERNAL CIRCULATION
IV. ANALYSIS
A. SITE TRIP GENERATION
B. DIRECTIONS OF APPROACH
C. TRAFFIC ASSIGNMENT
V. CONCLUSIONS AND RECOMMENDATIONS
VI. APPENDIX
I. I ~'i'RODU CT ION
This report presents the results of a traffic analysis performed for River-
chase, a §94-acre proposed development located in north Coppell, Texas. The
site, as shown in Figure 1, is located south of Sandy Lake Road, west of
Denton Creek, north of Belt Line Road, and east of Mockingbird Lane. River-
chase is planned to be a mixed-use development consisting of residential,
office, and retail development.
The objectives of this report are to (1) present the traffic analyses related
to the proposed zoning changes and traffic impact on the surrounding street
system, and (2) justify the need for Fairway Drive, on the southeast corner of
the proposed development.
II. SITE ACCESS
The site is located approximately 2 miles west of IH-35E and 2.5 miles north
of IH-635. Both freeways provide excellent regional access to the proposed
development. Several other roads, such as Sandy Lake and Belt Line, also
provide access to the site from the freeways. Existing roads serving the site
and their proposed improvements are shown in Figure 2.
Belt Line Road serves the southern boundary of the site. It connects IH-635
with IH-35E, providing convenient access from the site to either freeway.
Currently, Belt Line is a 24-foot, 2-lane undivided roadway between IH-35E and
Denton Tap. The City of Coppell Thoroughfare Plan shows this portion of Belt
Line as a 6-lane divided principal roadway, which will greatly improve access
to the site.
The northern boundary of this site is served by Sandy Lake Road. Sandy Lake
Road extends from IH-35E to west of Denton Tap, providing an alternate access
to the freeway from the site. This road is currently a 2-lane undivided
roadway which, under the City of Coppell Thoroughfare Plan, will be widened to
a major 6-lane divided roadway.
Denton Tap/Belt Line Road provides access on the west side of the site. This
roadway extends from IH-635 north to Sandy Lake Road. This 2-lane roadway is
also planned to be widened to a 6-lane divided thoroughfare.
The last of the major roadways providing site access is MacArthur Boulevard.
It will traverse north-south through the proposed development. North of the
site, MacArthur Boulevard is a 4-lane divided thoroughfare. Future plans for
this roadway under the City of Coppell Thoroughfare Plan include widening to a
6-lane divided thoroughfare and its extension north to IH-35E.
III. INTERNAL CIRCULATION
Internal circulation ls designed to collect sJte-generated traffic and distri-
bute it to the major thoroughfares such as Belt Line and Sandy Lake Roads.
This will be accomplished by MacArthur Boulevard, Riverchase Drlve, and Fair-
way Drive, providing site access at four intersections (see Figure 2). River-
chase Drive will be a 4-lane undivided roadway serving as the main collector
for individual tracts within the development, and carrying most of the traffic
generated from the development. Fairway Drive will connect to Belt Line Road
and Riverchase Drive, carrying the majority of the traffic going east toward
IH-35E, which otherwise would have to go through MacArthur. Therefore, the
combination of Riverchase and Fairway Drives will greatly reduce the traffic
impact at MacArthur Boulevard.
IV. ANALYS IS
Curren't traffic conditions, as well as traffic conditions forecast for the
year 2000, were used to provide a complete assessment of the local traffic
impact due to the proposed development. The year 2000 forecast conditions
were obtained from the State Department of Highways and Public Transportation
(SDHPT) 20-20-6 traffic assignment. These volumes serve as the base for
adding trips generated by proposed developments to establish forecasts of
future street and intersection loading.
A. Site Trip Generation
The traffic volumes generated by Rlverchase were calculated by using trip
generation factors from the 1983 Institute of Transportation Engineer's Trip
Generation Report (Third Edition). The number of residential dwelling units,
as well as the magnitude of office/retail square footage, were obtained from
the proposed site and land use plan as shown in Figure 3.
The number of retail and recreational trips was reduced by 25%. This reduc-
tion is based on the assumption that 25~ of the trips generated by these faci-
lities will be satisfied internally, and that no extra trips will be distri-
buted to the main roadway system. Similarly, the number of office trips was
reduced by 8~, which is a figure that has been derived from recent studies
performed in the Dallas area for similar developments.
As the results show in Table 1, the total number of daily trips generated by
the development was found to be 63,313. The highest traffic volumes were
generated in the AM Peak hours, with 3,861 inbound trips, and in the PM Peak
hours with 4,505 outbound trips.
Table 1
Site Generated Traffic
Riverchase
Total AM Peak PM Peak
Use/Magnitude Daily
Trips In { Out In Out
t
{
Single Family (9)-354 D.U. 3,540 74 { 195 223 131
Single Family (0)-485 D.U. 4,850 102 { 266 305 179
Townhouse (1)-262 D.U. 1,362 17 90 90 43
Multi-Family (1)-960 D.U. 5,856 115 460 448 224
Multi-Family (2)-1,857 D.U. 11,327 222 891 866 433
loffice (1)-1,315,497 S.F. 13,644 2,297 431 304 2,249
2Retail-378,230 S.F. 21,977 1,011 976 1,245 1,213
2Golf Clubhouse-146.492 Ac. 757 23 6 8 33
TOTALS 63,313 3,861 3,315 3,489 4,505
1 8~ Reduction of office trips.
2 25~ Reduction of retail and recreational trips.
B. Directions of Approach
The direction of site-related trips for Riverchase was assumed by using year
2000 projections as well as demographic characteristics and current travel
patterns. The daily trip distribution is shown in Figure 4, and was based on
a similar trip distribution study performed for this development by Pawa-
Winkelmann and Associates, Inc. The results are as follows:
Retail Office Residential
North 20~ 20~ 10~
East 2§~ 25~ 28~
South 15~ 40~
West 40~ 15~ 30~
c. Traffic Assignment
The daily distribution percentages shown in Figure 4 were applied to the site-
generated traffic to obtain the 24-hour site-generated traffic (see Figure 5).
The AM/PM generated traffic Is shown in Figure 6, and the year 2000 24-hour
traffic projections are shown in Figure 7.
V. CONCLUSIONS AND RECOMMENDATIONS
Based on the previous results, it was concluded that the roadway network at
the vicinity of the site will be able to accommodate the traffic generated by
the proposed development. Other conclusions and recommendations are as
follows:
- IH-35E and IH-635 provide Rlverchase excellent regional access. This
accessibility will be even further increased by the future extension
of MacArthur Boulevard north to IH-35E.
- Belt Line and Sandy Lake Roads will collect most of the traffic
generated within Riverchase. This will take place at intersections
with MacArthur Boulevard, Falrway Drive, and Rlverchase Drive.
- Fairway Drive will play an important role In reducing the traffic
volume at MacArthur. and will also provide easy access from the devel-
opment to Belt Line Road and IH-35E.
- Left-turn vehicle channelization into the site will be required at the
following intersections:
1. Belt Line Road and MacArthur Boulevard (see Figure 8).
2. Sandy Lake Road and MacArthur Boulevard.
3. Sandy Lake Road and Riverchase Drive.
4. Belt Line Road and Fairway Drive.
- Traffic signals are strongly recommended at the following intersec-
tions:
1. Belt Line Road and MacArthur Boulevard.
2. Sandy Lake Road and MacArthur Boulevard.
3. Belt Line Road and Fairway Drive (see Figure 9),
- Railroad crossing devices will eventually be required at the following
intersections with the St. Louis and Southern Railroad.
1. Belt Line Road and MacArthur Boulevard.
2. Belt Line Road and Fairway Drive (see Figure 9).
5
VI. APi~IX
NO SCALE
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~ t F~ndv Lakc
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~ PROPOSED
~) DEVELOPMENT
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Belt l,ine
North l-eke ~ --%_
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FIGURE 1
LOCATION MAP , )¢ NATHAN D. ~AIEE
CONSULTING ~NGINEERS, INC.
Tk~e~ NotthPark / ilO0 N.Ce~lral Expwy. I SmI~ 300
~lllll. Tezii 75231 / (214) 73g-4741
.-- ~ ~ PRIVATE DEVELOPERS N
CITY OF COPPELL, TX.
THOROUGHFARE PLAN
· · ~ CITY OF COPPELL tIP PROJECTS
[=I]']~ M ACAR']']~.~ NO SCALE
I
,~ SANDY LAKE ROAD ~ ~
Val ~ o
PROPOSED ROADWAY
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FIGURE $
PROPOSED SITE AND' ~ NATHAN D. M~IER
NO SCALE
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FIGURE 5
CONSULTING
GENERATED TRAFFIC
Thl4e NorthPi~k I BlO0 N.Cenlril Ezpwy.
· AM PEAK - INBOUND TRIPS
PM PEAK - OUTBOUND TRIPS
FIGURE 6
Three NorthPark / 8100 N.Centlll Enpwv. / Suite
Oailoe. Te~so 7S231 / (214) 739-4~41
FIGURE .7
TRAFFIC PROJECTIONS
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NOTE: TRAFFIC SIGNALS AND R.R. GRADF_ — I I
CROSSING PROTECTION DEVICES WILL BE \ \
REQUIRED IN FUTURE. I NATHAN D. MA I ER
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CONSULTING ENGINEERS, INC.
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\ \ I I Three North Park 8800 N. Central Expwy. Suite 300
1 ! Dallas, Texas 75231 (214) 739-4741
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FIGURE 9 SIGNALIZATION
SCALE 1"=40.
BELT LINE AT FAIRWAY DR.
\D v NATHAN D. MAIER
CONSULTING ENGINEFRS, INC.
Throo North Park 8900 N. Control Expwy. Bull. 300
Dol'as, Toxos 75231 (214) 739-4741
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