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. . .'. . .....,i.~~l,..:Show thed lmensions ofalldrlveways;+'lslands ,'~'ld;~walks':'h: ': h~ .....". ".' II1I1I
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''',;'.)../:.J~l,'A'6n ralsedcurbls required ar~und all edges'.o.-aJ1 partsofa"l.~~,:,ed areas..,
"\'/;/:!'i":.'?;:;\{"~ii2'li;f;-i'\:;;I,\-::;.':~"w' t flout except f on. . (To i nc 1 ude I S 1 ands ,"" plan tJ ng . a'reas '^" access ways ,,~".cJumpster
;;;;'"'Y'I1'<- locations, utl1 ltypads, etc~) Curbdetal'1 to be approved_ by City'Engineer...,,!
. ;... i" ......... .",ii "No except r ons . wi 1 l,be made for a rea s i~d i qated,o~ site 1'1 an as ureser"ed,;"fpr':'::
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City of College Station
POST OFFICE BOX 9960 1101 TEXAS AVENUE
COLLEGE STATION, TEXAS 77840-2499
Apr; 1 13, 1 984
MEMORANDur~
~ ..
Apr il. .,,26,.;)'<1984
PROJECT:
BUILDI~G ,..P:~~M IThiPP L IGA'TI ON
College StationReta'i]~ Center I I
Permit No .
ENGINEEiRING ...COMMENTS:
~
The <."lra.willg sets submitted for review are incomplete. No review
can be COtldl.l.cted as ,a result . Further, no review by this office
can beconsidereduflttl a Site Development Application has been
su'bmittedand approved.
~
Barton-j(schmanj(ssociales,i Inc.
Two. Allen Center, Houston, Texas 77002
TRANSM ITTAlSLI P
TO
Da V; d Pa I/{)IJ
f.()..... Box
F~911c!'J t!..1TQ.,.it)~) Tx 77~'t 0
EM;}" '~I{Qswe.I/J ,lJssocJat-~
I. ,.. . '.. '
-ro V1 -AsJfII t/v1 JfSSOCf~t'l'S X 11 C.
DATE
nee.te
!J./l~ 111
FOR YOUR ACTION
FORYOURINFORMA TION
PLS. REVIEW - COMMENT
PER YOUR REQUEST
FOR SIGNATURE
a..--- HOLD FOR CONFERENCE
L.....--
REPLY FROM
TO
Barton-ASChman .Associates,lnc.
Two Anen Center, Suite 2640 Houston, Texas 77002
713-757-1120
MEMORANDUM TO: RobertK. Nash
Dalsan Properties
FROM: JohnD. Zegeer, Principal Associate
Emily Bra.swell, Associate .
DA TE:February9,1984
SUBJECT: Kapchinski Development
Access. Analysis
The primary objective of this memorandum is to summarize the data collection and
a,nalysis phases 'of the..Kapchlnskl Development access study. and to recommend the most
effective access configuration based on that study. The Kapchinski Development is
located along the western frontage of Texas Avenue just south 'of .the intersection of
Texas.. Avenue and . State Highway .30 in College Station,. Texas (see '.Figure 1). The
p:ropertyhas 330 feet of frontage on Texas Avenue and 140 feet of frontage on Park :Place
(a local street which intersects Texas Avenue approximately 600 feet south of S.H. 30).
The planned use for the site isa retail facility of approximately 21,000 square feet which
will include neighborhood servic~lretail shop,s, as well as some restaurant/snackshops.
Based on the type of planned development, the location of the site and the existing traffic
on Texas Avenue and S.H.30, it was necessary to determine the type,numb~r and
placement of driveways along Texas Avenue that would safely and. adequately ser~f the
site. It .was-previouslyestablished that one driveway would be located on Park .Pl~ce ~o
serve. the. deve~opment.
,DA T A COLLECTION AND ANALYSIS
To adequately determine traffic charac;teristics on Texas Avenue, three types of
data were collected:
1. A field reconnaissance of roadway conditions and traffic control devices;
2. Peak periodtuming movement counts at the S.H.30/Texas Avenue inter-
section; ,
3. A survey of gap availability in both directions on Texas Avenue.
All three types of data were collected during the week of January 23 - 27, 1984.
Roadway Conditions
The Texas Avenue/S.H. 30 intersection is a T-lntersection with two southbound
lanes, two northbound lanes, twoleft-turn-only (southbound to eastbound) lanes, and one
right-turn-only northbound to eastbound lane, for a total of seven lanes on Texas. Avenue.
[6J
B'arton-AschmanAssociates, Inc.
Robert K. Nash
February 9, 1984
Page Two
State Highway 30 " hastworight-turn-only, westbound to northboundlanes~ one left-turn-
only westbound .' to southbound lane, and two eastbound lanes, fora total of five lanes at
the intersection.
Based on. volume counts.conductedduringtheP.M..peakperiod on.. Monday, January
23,1984, the heaviest volumes occur north and southbound on Texas Avenue, followed by
the left turn .. from southbound Texas 'to eastbound S.H.. 30 and, the left-turn from,
westbound S.H. 30 to southbound Texas Avenue (see Table I). The total volume for the
intersection Jrom 5:00 . -6:00P.M. is approximately 4,300vehic1es. .,Cdtica.lrnovern~nt
analysi~and Jieldobservationplace the intersection level of service at thy1?rr'enra.F)ge of
Level ofServ:ice E,whichischaracterizedpy . unstable · traffic' flow, heavy congestion, and
a 70 talOO percent probability of delays of one cycle or more for vehicles: approaching
the inte'rsection on the critical,approaches.
Table '1
PEAK-HOURTRAFFICCOUNTSUMMARY-- . TEXAS AVENUE/S.H. .30
(MONDAY, .JANU ARY. 23,. .1984)
Time
7~~~r
5:15
5:30
5:45
6:00
5:00-6:00
North Approach
Straight 'Left
Through Turn
South Approach
Right Straight
Turn Through
East Approach
Right Left
Turn Turn
Totals
383 201 88 260 156 180
338 196 104 206 120 98
264 155 65 182 126 157
299 134 94 207 128 144
1 , 284 686 351 855 530 579
1,268
1 ,062
949
1,006
4,285
Gap Availability
In order to determine the number of gaps available for vehicles entering or exiting
the site on Texas Avenue, it was necessary to conduct two thirty-minute surveys:
1. Gaps available across all seven lanes of traffic (northbound and southbound);
2. Gaps avaiIableac'ross the two southbound lanes.
Table 2 summarizes the results of both surveys .and rev.ealsapproximately thirty
gaps per hour for outbound left-turns on Texas A venue. and. just. over.' two hundred gaps
,suitable for outbound right-turns or for. inbound left turns. This was determined by
expanding the thirty-minute surveys to one hour and then,',multiplying, the gap size (in
seconds) by the number of vehicles which could use gaps .of varying duration. _ For left
turns out of the site, gaps. of between 7.5 and 10 i seconds could be used I?Y one vehicle
each,; gaps of between 12.5 and 15.0second~couldbe used by two vehicles each. For right
Barton-AschmanAssociates, .Inc. \
Robert 'K.'Nash
February 9, 1984
Page Three
turns out of the site or left turns into the site, gaps of between 5.0 and 10 ,seconds could be
used by one vehicle; 10 - 15 seconds by two vehicles; and more than 15 seconds, three
vehicles.
Table 2 1
TRAFFIC GAP LENGTHS,
Time North . and Southbound Time Southbound Only
Ending ,5- 7.5- 10- 12.5- 15- Ending 5- 7.5- 10- 12.5- 15-
P.M. 7.5 10 12.5 15 20 20+ P.M. 7.5 10 12.5 15 20
3:00 7 2 3:35 9 5 1 2
3:05 7 1 3:40 9 1 1 3
3:10 6 2 3:45 7 2 2 1
3:15 6 2 3:50 5 2 1 2
3:20 2 3 1 3:55 4 3 2
3:25 5 2 2 4:00 6 5 1 1
Total Total
Gaps 33 12 3 Gaps 40 18 5 7 5
20+
1
2
1
4
Gaps = 1(12)+2(3)= 18130 minutes
Gaps = 1(58)+2(12)+3(9) = 109/30 minutes
1 Surveys conducted Monday, January 23, 1984.
Site Traffic Demand
Based on ITE Trip Generation Rates for community shopping centers of under 50,000
square feet gross leasable area, the site will generate approximately 120 vehicles in and
120 vehicles out during the P.M. peak hour - the most 'critical hour of traffic activity.
Site configuration, local population distribution and traffic patterns on Texas Avenue
indicate that 20. percent of. inbound vehicles will use the Texas. Avenue right turn access
. drive. and 2'0 percent willuse,the Texas Avenue inbound left turn access drive; 25 percent
. will turn right into the Park Place access drive and 3.5 percent will turn left into the Park
Place. drive. Of the ,120 outbound vehicles,., 20 percent will exit the Texas Avenue
driveway and turn right;'.and80 percent...ofthevehicles will exit from the' Park Place'
Drive and turn right on park Place (35 percent) or will proceed to Texas Avenue (45
percent).
Barton-Aschman Associates, Inc.
Robert K. Nash
February 9, 1984
Page Four
The availability for outbound left turns (about 40 gapsldoesnot match the demand
(about 40 vehicl~s)andcannot~afelybeprovided due .toheavytraffi9 congestion. and
queues at the S.H. 30lTexasAvenue intersection; however, sufficient gaps are available to
provide inbound left turns and both inbound and outbound right turns along Texas Avenue
(see Table 3).
Table 3
DEMAND VS. GAPS FOR ACCESS
Movements
Projected Demand
Gaps Available 1
Right Turns. IN
Right Turns OUT
Left Turns IN
20
N/A
20
220
220
20
Left Turns OUT
40
40
1 These are not additive
N.A. -not applicable
RECOMMENDATIONS
FIgure 2 illustrates the recommended access plan for the site. The driveway servIng
the northern end of the property is there to serve only vehicles turning right from or to
Texas Avenue. There are an adequate number of gaps available in southbound Texas
Avenue traffic to allow forright-turn-in right-turn-outaccess for the site, but the right-
turn-in access drive must be located near the northern boundary of the site to preclude
low speed left turning vehicles from .S.H... 30 . from attempting to weave across the
relatively high speed southbound Texas Avenue traffic stream to reach that access point.
This northern driveway should also be channelized to provide separa~ion for inbpund and
outbound vehicles at the throat of the driveway.
The"driveway at the southern end of the property should be channelized and signed
for inbollndleft turns and outbound right turns only. Qriveway design should be such that
outbound left turns and inbound right turns are' made practically impossible. Left turn
outbound access from the site onto Texas Avenue between S.H. 30 and Park P~ace is not
feasible for the following reasons:
Barton-AschtnanAssociates, Inc.
RobertK. Nash
February 9, 1984
Page Five
a) The S.H.30/TexasAvenue intersection is presently very congested during peak
periods.
b) An inadequate' number of gaps in the Texas Avenue traffic stream are
available for left turn exit traffic from the site.
Because southbound Texas Avenue traffic and left turn trafficfromS.H.. 30 begin to
merge about 220 feet north of the proposed southern driveway, the turbuleQttraffic flow
which results from the merging of two traffic streams precludes outbound l~fl. turns and
inbound right turns at that point.. However, based on theavailabilityo~<g~Rsi in the
southbound traffic, it is possible to provide inbound left turns at thispoil'lt~ >~,I1~storage
available in the two-way left turn lane would allow for safe decelerationand~:torage for
vehicles.' making .this. maneuver.
The two driveway designs recommended along Texas Avenue will ensuretnat access
Can be provided safely and efficiently for both inbound and outbound right,tl)rnsand for
inbound left turns on Texas Avenue. Unsafe weaving or rapid speed changes,:tl1rough the
S.H. 3D/Texas Avenue intersection will be discouraged 'and north-south traffic movements
on Texas. Avenue will... not be further disrupted.
JDZ:jan
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LEGEND
---Campus Boundary
* KapchinskiOevelopment
.
... .. .Figure 1
LOCATION ~AP KAPCHINSKl,'DEVELqPMENT
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RE COMMENDED ACCESS ';..~PL7\~
COLLEGE STATION.'..TEXAS