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HomeMy WebLinkAboutMiscellaneous (2)I~.. ~ ~~ -i i ~I ~~ ~~.~ »T~oDVCT~aN ;~-~ This traffic impact analysis has been camp eted in accordance ~_ _.. with generally accepted traffic engineering procedures to meet the requirements of the City of College Station . The report -~, was commissioned by .Buchanan/Soil Mechanics, Inc. in i association with their preparation of the Revised ~Iaste~ Plan ~,:.~~ for Woodcreek subdvlslon. ~~, The. assistance Hof several individuals is hereby acknoWled.g~d; Mr. David Pullen, City of _College ~tation,_ Mr. George Borskie, Texas. State Department of Highways and Public ---~ Transportation, and Mr. David Neil, College -Station ~LL~~ ~ Independent School District. ~, ~--~ Purpose and Scope of Study i~~ The ur ose of this stud is to assess the traffic irn act of p p Y p ~ the development proposed in tie Revised Master Plan of ~ -, '~ ~loodcreek subdivision. This plan indicates certain `~ ' configurations of streets and land .uses that day affect traff is volumes and characteristics on the surrounding st.rcet ~~ system: These effects are quantified and analyzed `with ;, `~ L , traffic control, and roadway capacity respect to roadway .~ ~ . . ions. Con lusions_ and recommendations are made operat c --, concerning future street system requirements`. ~, y r--~:~ i J r_ 7 ~ ' i '{ ~'~~ 'I I " ~-, _ f I~ ~ ~ I ,l , , ,, '~~ ~~ c~.. ~,~~ i i i -._.J ~' I~ i j i ~1 "; -~ i I I j g - ~,_-.i u __ ~. ~ECTIOH ~ --SAND USE r ~ ~, Phys-ical Location end Land Ch,aracter~.stcs ~`_ Woodcre~k is a subdivision of the pity of College Stanion, µ~ texas encompassing approxmate3.y 200 acres of land ire the '~ southeastern quadrant of the ci y. A location map is ~~hown ~~~~~ on ..Figure.. 1 The area is l~.ghtly roll ng and wooded '....and. ~- includes two tikes and several creeks. This area is well ,~ ~;~ _ suited to single family residential development. ~: Woodcreek is bounded on the south by Rock Prairie Road a~~d on the west b~ the east frontage road of State Highway d, ', commonly called the East By-Pass. The areas north of Rock _ Prairie Road., including this subdivision, drain directly to Carter's Creek while the areas south of Rock Prairie Road ~~~ ~ drain to Lick Creek. The eastern ar~d a portion of ..the ' northern boundar of the subdivision adjoins the Fo~fre y ; Subdivision and presently dorms the City. Lzmlts of College r ~ Station in this.area. Cit sereices r~cludn:g waver, sewer, Y ~~ - electrical, solid waste, and emergency services have been: provided to the subdivision and the water,, sewer, and street ~~- systems are currently .operated :and maintained by the ~;ity, With. the exception of the street system within the pl~~nned ,v_. unit development- ~PUD~ which i.s privately maintained. ---, Woo creek subdivision includes a homeowners association ~ahch is responsible for common .space.. in the subdivision along with ~~ .homeowners'_nterests. '~' Woodcreok subdivision is currently composed of primarily ~_! sin le family residential deve opment, although some appurtenant development such as park and ecreatonal tracts ~~~ are included. Two. areas of commercial development are ~~ '~ indicated, one near the inter ection of Woodcreek Drive with -~ the fronts Broad and another small area at the tersection g ~ .. -. _ of Stonebrooh Drive and Rock' Prairie Road.. Section tine, - , ~, f~ ncludn the- PUD, Section Two, and Section Three are g currently nearing full development, although some residential construction persstso The PUD is approximately ~0 percent ~i built out. Development status, acreage, land use, and number of residential lots fay development phases-within Woodcreek is shown in Table 1. Existing Land Use - on-Site Existing development consists of approximately 65 acres of ~~ single family residences including a Planned Unit Development _- (PUD) of approximately 15 acres. The entire residential area is zoned for low density residential tR-1~`wth the PUD ~~ constituting a special case. The PtJD accounts for 74 single ` ~ • ~ ~ e i family dwelling sites -ln 14.78 acres :yielding a nominal density of 5 units per acre. The remaining portions of 'i i Sections 1, 2 ar~d 3 contain 1~7 lots for single family ~~ ~~ 2 ~-_-~ ~ ~ `__ T4 ~__,, ~, DALLAS ,! _,` ~; ~~ ~~~_~.~J ~~ ~~1 ~ ~~ ~ __ . ~' TO TC- CALDWELL HWY 21 MAOISONVILLE ._ ,~~_, i D 1 rn cn ~, oo ~ _ ~ 1 ~.i:ti.J i 0o ao _ r i -~ o n ' f ~ ~ o -v ~ ~J m cn ~ ~~: ~, TO ' SOMERvILLE HwY.60 ° UNIVERSITY DR. 1 TO . _ HWY. 30 NUNTSVILLE . ~ r,- i ~~` 1 ~~ ~ .~ a ~, ~ .. :. ROCK PRAIRIE R0 ~~.. '~~ '~"' . ' ~~~~~~ R '~ IRIE RD i __~ ;, TO j I- I ~ E HOUSTON ,_ _._ ~.I FIGURE I f~~i ~__-' ~.__ ~ { i i r_~..! L.; ~ a f "_~ ! ~.~~ TABLE 1 WOODCREEK MASTER FLAN ~~~~ LAND USE i 4~ PROPOSED 'RESIDENTIAL _, ~~, ;, TRACT ACREAGE LAND I~SE LOTS Z i SECTION 1 20.50 RESIDENTIAL 57 PUD 14.78 RESIDENTIAL 70 r,- ' ~ SECTION 2 21.12 RESIDENTIAL 5G , '_ POOL TRACT 0e37 RESIDENTIAL 0 I ~ SECTION 3 ~~ _8.6b RESIDENTIAL - ~ 14 ~.-~ SECTION 4 18.09 RESIDENTIAL - 44 1 ~ SECTION.5 _14.92 RESIDENTIAL 46 SECTION ~ 27.76 RESIDENTIAL 37 ~---~ { LA~{E TRACT H 4.32 RESIDENTLAL D ',~ LAKE TRACT G 2.95 R~SIDEN'~IAL 0 '. LOT 1 BLOCK K 1.41... GEN COMMERCIAL 0 LOT 1 $LOCK G 1.00 GEN COMMERCIAL 0 __ F~ CITY PARK x.58 PARK 0 ~ '~._1 FLOCK ~ 2 0 9.3 8 RESIDENTIAL 18 BLOCK 21 6.60 RESIDENTIAL 12 a -~ $LOCK 22 10.17 RESIDENTIAL 24 BLOCK 23 3.`77 RESIDENTIAL 9 ~.~ BLOCK 24 & 25 4.52 RESIDENTIAL 16 ~~ ~ BLtJCK 26 & 27 ` 6.3 8 RESIDENTIAL 21 '' CORNERSTONE SECT: 1 8..27 GEN COMMERCIAL 0 ~' CORNERSTONE B 7.75 GEN COMMERCIAL 0 EXISTING .LOT 1 0.45 GEN COMMERCIAL 0 e-~ ~ _ _ t__~ TOTAL ACREAGE 19.75 TOTAL LOTS 424.Q0 ~---~ ~i ~~:. ~~~ ~ _ ~~:~ __ ~'~ - . ~~ i i .__ ~.~ _ 4 ONING R-1 R-1 ~-1 R- ~. R-1 R-1 R-1 R-1 R-1 C~-1 C-1 R-1 R~-1 R-1 R--1 R-1 R-1 C-1 C-1 C-1 ~ __~ j a ~ i ,i__, f__l 1 II i ~ ) ~~_~ ellings in 50.28 acre, yiel~.ir~ig a nominal density of 2.5 . units per acre._ ( ~ ~l ~! _ Existing Land Use -- Off-Site ~~ Thee existing land :..use of the.:.~reas surrounding the site is ~~~ mixed .with -predominantly agricultural open ~AO~ and`low -J density residential (R-1).: the Foxfire subdivision adjoins r-, the property to the northeast and is compri ed of large: to '~,, sing e family residences. This subdivision is not within the city limits of the City of College Station but is within the:. extraterritorial jurisdiction:{FTJ). The street and drainage ~@ system, as well as the water and sewer s~stems...,.are primarily ~~~ outside the contro and maintenance of t~e:.City and do not, in general , conf orb to City requirements and standards . ~ f ew ~~ small businesses abut'State Highway b as well a~ Rack Prairie w ~ of Road. The primary access point .for the existing City _~ __ , College Station Landf-ill site is Rock Prairie Road at, i s 5 f _ intersection with the east frontage road. A psychiatric r~--~ ~i hospital occupies a site south of the study area with access only to the. east frontage-road. Development further south I should have access to the main lanes of State Highway ~~ vii ,:-,, ~, ..Greens Prairie Road. Propa~ed.:.Land Use - o~-5te r, ~ _ The ro aced development o~ the Woodcreek site, as indicated -p p ~~:.~ on the current Revised Master Plan, is limited to angle -~_ farni residential with the aforementioned exceptions of the y , ~ ~~ commercial tracts and the recreational areas. I~t is ~~ ~~ ~ ~ • understood that Sections 4 and 5 are intended forlmmec~iate development with Section ~ to follow shortly hereafter, The k ~ r-^~ entire are., is currently zoned I.ow density residential t ~~-1~ , ' ~ again with he noted exceptions. Including the areas ~ .~~ de ignated far re ldential lots there are ;indicated on the Revised: Master Plan-234.:-proposed new Tats on a total 0~=.102 ~1 , acres yielding a density of 2.3 units per acre. ; ~ ~~~ i I There are two areas presently des-mated for. commercial use ' ~^~ s reviousl mentioned. The first includes: three lots zoned a p ~' ,~ ~ C-1 avid the secdnd conta~.ns two small lots :also designated C- 1. These :areas total almost l9 acres. Actual usage of these r---~ five lots is as of yet unspecified. General commercial usage- ' in keeping .with requirements for C-1 has been as umed for anal ss. Y ~,'~ _ The recreational areas preciously mentioned include a -~ park containing G , 58 acres and two lake areas , dedicated City . one of which borders the....park facility. The park is intended `~ ~ for neighborhood usage and is proposed to serve-as a focus , i ~ paint for usage of the two lake areas as ~ogginq trans. _ Detailed plans have not been developed for these areas. i ~ ~.~. ;~ 6 _ ~~ ii ~ e ` i I -- ~_..~ V y 1 ---~ roposed Land Use - i~ff -Site _, The College Station Future Land Use Plan -- Developed Areas ~~~ (March 1989, and the Land Use Concepts -Developing areas plan (March 1989) :were utilized for projections of land use in this report. Some variations to these plans are already ,, '~ evident, such a the tract made the focus ;of ` this report, y however, these documents provide the. bes information { available for these projections, ' ~ ~' The areas adjacent to he East By-Pass are generally indicated as retail or office commercial on tie land use plans, as wou d ~,' be expected. Qutsde the band of commercial area the plan ~I ~_ sidential develo merit. Rock ~ndlcates pr~.marily low density re p Prairie Road appears to: be the southern boundary. of significant commercial develo~m~ent. Northward from the subject development the band of office and retail commez•~lal ~ `~ land use extends paste Emerald Parkwa~r which forms the next major interchange ~n the .:East By-pass. Rock Prairie Road ~~ should be a focus of commer~ia development on the east'side i~--~ of the .:East ~y-Pass as it has been on the west side. This F focus will have a significant effect on the utilization' of f ~ - Rock Prairie Road and its intersection with the By-Pass. ~~i An additional consideration is that the College Station -, Lndependent school District has too school facilitespl~nned ~~~ for the area. The District currently owns approximately 34 acres on the south side of Rock Prairie Road nea~• its pro~~osed ~' intersection with Stonebrook Drive. This site is planned for utili2ation as a junior high or middle school campus housing ~~ approximately: loflfl students. -This development is not ~~ - anticipated until some time after the year 2QQ0. The District plans an elementary school campus adjacent to sebesta Road for future use, possibly as soon as 1898. This campus ~~ould !, l typically house approximately X50 students. Neither facility has advanced beyond the Tong range planning phase according _, to District staff, `~~ These land uses, along with the low density residential subdivisions such as Emerald Forest,-Foxfire, and Woodcreek ~--, w 11 be the most significant land use. areas - affecting the ~~ traffic patterns included in thus report. ~-' ' ~ _, i ;~ ~; ', 7 --~ L ~. .. - _ -- - ~~.. I~~ `_ ~ - SECTIO I TR~ISPC~RTATIG SYST~I .__ ~ '~ . The conflicts between providing access o individual pieces ~~.-~ of property and serving through- movements require the - classification of streets and: acknowledging their function ~~,_~ within the transportation system. Access and circulation are two major factors in any traffic impact ana3.ysis. Urban ._ LL systems such as within this s u~y area are typically broken ~-, down into four categories; principal or major arterial,.... minor arterial, collector, and local street. Gradation of ~`~~ collectors into major and..:minor collectors is accason,al y util2ed. Developments of the scope proposed in this project '~~ rarely affect major arterials, however minor arterials- and ~~ ',_ ' _ collectors can be significantly .affected. The study ;area is { shown on Figure 2. ~, -., 4 Existing Street y - Functional' classification of streets in college station is ~ ~ ~, ` _ available in published form in the City of college Station ~-~--~ Thoroughfare and Transportation Irnprovernent Plan This document indicatesexi tng and proposed future major ~oad.ways ~~~~ ~ a~t and [above the col lector level . Table 2 provides the street ~ '_ ' ` name., classifcation, and number of existing lanes for streets inn the study area. Number of lanes is given at controlling ~-~ ~ ntersectons or structures . ~:~ TABLE 2 a ~ ~~` - CLASSIFICATION ~]LA1 STREET SH 6 ~E, By-Pass..} Major Arterial 4 Div ,~ Controlled Access w/FR ~_~ F.M. 2818/ Major Arterial 5 L~~ ,, Emerald Pkwy. ~---' Greens Prairie Rd. Major Arterial 2 r~ Rock Prairie Raad Minor Arterial 3 ~.I _Sebesta Road -Collector 2 _, ,~ Foxfre/Stonebrook `Collector 2 ~ ~, i .__, WoQdcreek Drive Collector 2 . _. The frontage roads along the East By-.Pass currently handle two , ~, way traf f ~.c . ~oodcreek Drive and Sebesta` Road =intersect the ---~ fron age roads, whereas he intersections of Emerald Parkway, .. ~ Rock Prairie Road and Greene Prairie Road are full interchanges. __ Three subdivsions_exst in relatively. isolated states on the -- east side o.f the East By-Pass between Emerald Parkway and.:.Rock ~'~ Prairie Road:. :Emerald. Forest resides on-either side of 8 I ~, ~ ~Z i i._., J I-- ~ Emerald Parkwa and is not connected directly to F'oxf ire which y ad'ons Se~esta Road to the south. Emerald Farest has access ~. ~ ~ to Sebesta Road, however here- is no continuous roadway I ~.___~ between the subdivisions. Eoxfire adjoins Woodcreek on ~ onion of its` eastern and northern boundary. ~'her~ is __~, p divisions. currently no direct-roadway access between thesesub r ~ :~. There are three existn intersections of primary concern in • ~~-,:, this study area; the lntersect~.on of woodcreek Drive with the east fronta e road of the East By-Pass, the intersection of ~_~ Woodcreek .Drive and Stonebrook Drive, and the intersecaion of Rock Prairie `Road with the East By--Pass.. Currently the I~_, onl traffic control that exists at intersections is stogy or Y { ' ol, The intersections of Woodcreek Drive witY~ the --~ y~.eld contr.: . with tie east east frontage .road westbound Rock Prairie ~~ fronta e road. and eas bound Rock Prair- ie Road :.:with the east g '~ fronta 'e road all currently Piave stop.. signs. Yield cor-trol ~~ g - exists at the freeway ramps in the area except far just 4 outh of Emerald Parkway on the east frontage road, which has a stop ~~ s n: No traffic si nals exi t'withinthe study area. '~ Currentl there is only one access point to Woodcreek Y ~ i_ , ., ubdvsion bein at the intersection of Woodcreek Drive with a s ~ ebesta ~_ the East By-:Pass. The only access to Foxfire is from 5 Roa' Emerald Forest has two points of access', the pri.rn.ary "~ ~~, along Emerald Parkway, and aminor-access point from Sebesta i Rona . ~ ~ ~ Accident information is currently unavailable along the.: East ~~ i i B -Pass f ronta a road and its intersections due to the rE:cent y g ~~ ~' modification of those roadways. Accident statistics available from the SDH~T are typically almost a::year behind. ;, ,_ p _PropU ed Modifications to Street System a ' Both within this ro'ect and outsdeit there are several ~.W~ ~ ~ s nifcant changes in store for the street ystem within -the study area. Both operational and physical changes are ~-~~~ currently in the planning and construction phases. These changes would be outlined as follows: ~ ast S -Pass are to Frontage roads _alon~ the E y 1. ~ ~ ' motel the next- become one way_wlthln approxl y ~~ twe years. This will occur from the intersection: of the frontage roads with Rock Prairie Road :northward.. 2. Rock Prairie Raad wil be relocated east of ~~-~ the East By-Pass to meet the structure ~. presently oeated where the westerly portion of Rock Prairie Road intersects the B~-Pass. -, This improvement is tentatively scheduled for ii a three year bond program to be voted on by - - ---, _ 9 - ~: --~_-~ ,~ __ ~~ he City of Col eqe Station in ~cto~er of ~. ~ 19 ~ o . ~. ~~~~ ~ `.~ .' 9 ~~ ~~ o~ ~' ~ . ::.; 3. Two points of connection between. Wo~dcreek and Faxfire are indicated far future phases of --~~ Woodcreek. Both points of connection include ~, collector streets. Thy connection of _,~ Woodcreek Drive with Faulkner Drive is ,---~ anticipated in Section 6 of Woodcreek which is '~j tentatively planned for late 1891, i i ~ 4. Stonebrook Drive will be connected with Rock t ''^' Prairie Road at the southern boundary of '~~ Woodcreek. The schedule for this cons ruction ._ is uncert~ai~n and will be addressed in a later --~ section of this report. ~~L.~_ 5. F.M. 2818 wli'be connected with the East By- a Pass at Emerald Parkway. This prflject is ~~ ~ - scheduled fora piing Petting in 19..91 and a~ ~-~ completion date in late 192. ~ ~`~ The major change included above is the operational. .change i ~ involved with the one way..frontage roads. This will require ~~ si ificant changes in the normal access ..and. circulation for --~ Woodcreek subdivision as t is presently configured since the onl access paint is north of the .Rock Prairie Road Y ,~ `~ interchange .- Given one way f r~ontage roads , a driver wou~~d be required to travel north along the frontage road from ~~~~ Woodcreek Drive to Emerald Parkway/F.M. 2818 to g,et into Colle e Station. This assumes that the F.M. 281 connection q _ . to Emerald Parkway.: is made as scheduled; otherwise, the. only ~~-~ ~ routes would be north to Harvey Road or to turn back south at ~ ~ • the Emerald Parkway interchange to access $uslnes 6. ~ - ection of Stonebrook Drive with Rock Prairie Road The corm ~ ~ ~'` . would significant3y improve the access and circulation L characteristics of Woodcreek Subdivision. It not only allows two access points but provides an important outlet to the. ~~~ subdivision 'for' access to south College Station hat is not ~ ~ available otherwise exce t as described above.. This outlet p . , becomes even mare significant :when the: connections to Foxfire ~---~ are made. These connections will cause tie eastern section ''~ ~ ~ of Woodcreek Drive, and Stoneprook to _truly function as . collector streetsl ;_ , `~; The realignment of Rock Prairie Road will provide two -~--' benefits . It will.. allow Rock- Prairie Road to develop as a minor arterial, which it presently :cannot, due to geometric ~~ ref iciencies, and will create smooth traffic flow directly ~ into and out of the existing interchange structure at he Ea t. _ _ By-Pass. While hat immediately necessary, as traffic volumes ~-~~ increase with: future development th-is :improvement will become. '' ncrea ingly important. -, ,; 10 i__- _._ ~----~ ~~~ ~~~-_~ ~ zoo ~~z TR~~~zc vo~ur~s n v ~~ c~~s~cs ~~ ~ Traffic generation is a primary part of any traffic i~lpact ~~~ analysis on a developing area such as this study ~~rea. Projections are utilized where development is not establ~.shed ~F~_~, to predict traffic volumes. These project-ions assume that ~ ~ predicted development .patterns will., ..remain as a~nticipatec~ and ~~LLJ that there are n~ unusual traffic generators other than those ~ currently proposed, such as the. school ices mentioned ~~~~ reviousl Tri eneration statistics and peak hour p y p ~ ~-~ ro ' ect-ions have been made using data f ram the Tr.~nsportation p 7 I a d Traffic En ineer'n Handbo second Edit'on 1.82, published by the Institute of Transportation Engineers. ~'or '~ ~~ ~ avers es have been the commercial land uses general data or g used. It is clear that actual proposed commercial development can var widely in its trip generation characteristics. This Y ~ treatment is general in nature '.and should not be used, for ~ 'fic rn rove~ents or detailed anal pis of special sped p y ituatons. A summary of projected..volumes is shown on F~.gure -~ 4 Existin traffic voiurne were determined from twenty. four hour g '~ ' machine counts made on Tuesday ,July ~4, 1990. Count l~acaf:ions <<, and resulting volumes are shown on Figure 3. Due to the nature of ..the: community and the significant influence of Texas 'i ,---~ A&M University it was felt that the direct measurement 'of '~ volumes. during the summer would not :accurately represent peak `---~ volumes that would be expected during the normal school year . ~~ A correction factor was .applied to each volume measurement to ~ ~ ~~ inflate the figures in an attempt.. to conservatively -reprE~sent ~,_ olumes during a reasonable peak period for analysis.... The factor of 1.3~ used to infelate these values represent~~' the ratio of normal o ulatan of -College Station plus the nc7r~al pp 'i~ student enrollnvent at Texas A&M during a spring or summer term, divided by the normal population plus ~ the` summer -- a0 00)/(55,.400.15,0 )] enrollment [t~5,.a00+40,0. ~ ~ i . ~--~ Existing Vo3um~s r~ ~ ~ ' ned far Waodcreek- Drive near its. Existing volumes_were deterrni j 'E ~ intersection with the.. East Frontage Road of the East Ey-~~ass w Counts at this location, taken at 15 minute inter~rals, ~ ~~ indicated peak hour volumes during he morning peak ( 6:00 - '; 7:-00 A.M.) westbound (outbound}, and evening peak (5:00 - 6:Op P,M.~ eastbound (inbound). The e enng peak hour volume I (93-v/hr) was sgnifican ly higher han the moaning peak hour ~'~ _ (G9 v/hrj at about 13% of ADT eastbound versus :10.5% ~ .~.~T westbound, It `is noted that the morning ~rolumes were similar for the two hours surrounding 7:00 A.M and that the next hour 1 G 8:00 - 9.00 A.M. was nearly as :high,' indicating a dispersion ~ ~ _-~ . of morning traff lc around the peak.. Other counts were takenstrictl~ on a 24 hour basis. These ~~ counts were taken for Rock PrairieRoad, east of the East 1 ~~~~ ~~ ~~ J ~T ~ ~ ~ i t - ~~._..~ .. - i ~ 4 ~.___~ Frontage Road., carnbined in both directions ; eastbound on Rock Prairie Road just west of the East Frontage Road, on the -- '~'~ bridges and northbound on the East Frontage Road north of ~~_~ Woodcreek Drive ~~~~ ~~ projected On-Site Vo times ~~ - ~ ro "ections were .made. for two ur oses; 1)i the site .volume p ~ p P On ,- ..- . com orison of volume with capacity at the intersection of P ~, _ Waodoreek Drive with 'the -East By-Pass f rontage road undez~ two ~ ~----~~' wa o eration and, 2~ combination with off-site volumes for ~' ; P , co~nparlson with various capacities after connecta.ons are made ~~^~ to Foxfire subdivision and Rock Prairie Raad when one way ~~ frontage .roads are operative. These are the two c;aces anal zed in this report as be controlling cases. ProjE;cted Y ~~ ;~ ~ j volumes are indicated ors Figure 4. __' case 1. ! ~ - Itwas assumed for Case 1. rojectonpurposes that Sections p '~ 1-3 , including the PUD were fully_ occupied, and that 5ect.ions r 4-E ..were comp eted and occupied. It was further assumed. that --~ the connection to Foxfire at Faulkner was completed and that G~ the connection of Stonebraok to Rock Prairie Road was not in ~..~_ ' lace and that the frontage roads were in two way operation. P This should be a worst case scenario according to existing plans for development:. Pro "ected volumes for woodcreek :Drive under these assumptions ~ ~---, " the outbound morning are 28fl veha.cles per hour (v/hr~ ..for ~.~i " peak, and. 3 2 ~ v/hr for the inbound evening peak These: values are based on 45G total lots available under this development ~_-; configuration ar~d having Waodcreek Dr~re as` the only access aint. Analysi of this case is :found in another:`. section of P L~ this report. ~T-~ Case 2. _ ._ It was assumed for Case 2. projection purposes that full ~~ development and occupation of both Wooocreek and Foxfire ~ J subdivisions had taken place. This would include.. all , residential 1ots,;commerca~. properties, and the park shown wry on the.-Revised faster Plan of Woodcree~, and ail residential '' lots in Foxfre Phases 1-4, Additional assumptions were that ~~ the connections of Woodcreok to Foxfire and Rock Prairie Road .. .--:_ was that one w e made. Thee: rimar o erational assum tion er _ _ P y p p ~~ " way frontage roads wou d be In - of f ec This assumption ~~ E ' re uired that tie split between traffic using the East q ~~ Fronta e.Road via ~aodcreek Drive and the traffic using Rock g ~j split hinges rarie Road via Stonebrook be estimated. This P i j ~,! " . on the availability of the F.M. 28'18 connection to Texas ___. Avenue via the Emerald Parkway interchange. This SDHPT project is cheduled for a fall letting and should take u ~~ ,, ld approximately 24 months to complete. This schedule _wo ~~ ,, 13 ~~ , ~A i. IDi ~._..._. _..._.~) ~___a indicate that thi cxitical connection should be avaaable a roxirnatel concurrently with the conversion to an~e way pp Y franta e roads. based on these data an estimate -that 3~ g 4 ;_ 'the Rock Frairie Road percent of the_ traffic would utilize interchan a and 70 percent would utilize the Emerald Farkway g r,_, interchan a was: deve oped for ~.raff is projections in this g ,~ Stua No attempt was made to include projections of tr<~f f is Y area due to the generation ~y the two schools In he ~._~ acted nature of the time frame anticipated for their pratr , con tructan k Mornin and evenn peakhour projections were made for .the g g _~ ~ ~ 'these intersections of Woodcreek Dra.ve and stonebrook Drive ~ ~~ ~ ro ' ections indicate that ~ peak hour voiurne of approximately p ~ ~~ 2!61 v r would be expected at this intersection during .the Ih . ared resldenti.al traffic was consl Onl morni.n eak g p Y wl th ',' , - 265 lots contributing 30~ and 273:.1ots contributing 10~~. A ~J ibuton of counter flow Cinboundj traffic iu ing contr Stonebrook Drive ,southbound into the subdivisions was also ~ '~ r---~ ~ ~~ proj~eoted e of ~. roximatel 684 v h-r was a.ncluded. A volum pp Y ~ { , , for the evening peak. $oth residential and commercial traffic s consde-red` with 423 lots. contributing 10:0;% inbound wa r-~ -traffic 27 3 ~~ lots.: contributing 100 outbound, and 2 65 lots '~ ., contributin 30r outbound gaffe. The commercial 16.5 acres ! ~.:a a1so cantribut~ed 30 a outbound traffib. Evening peak counter w ~ outbound traffic was sgnf icant in volumeprojections flo ~ ~ at the intersection aswere the vo times duetocommercial ~-~ raf fie. ~~ hour ro'ectons were. made for Stonebrook Drive Marning.peak p ~ ~~ ~ at its inter ecticn with Rock`Prairie Road. A projection of ~. 173 vehicles er hour wa indicated for Stonebrook Drive p r-~ southbound. A roximately one third of a total of 432 lots pA 1 in Woodcreek and 190 lots_ in ~`oxfre were included, in these ,, ,_ _ ro'ections alon with the contribution of the two small 7 g p _ , commercial lots near the intersec ion. r-~ ---~-~ Marnin eak hour. ro 'actions were made for the intersection g ~ p 7 of Woodcreek Drive with. the East Frontage Road. A projection ~~~ of 190 v hr was indicated for Woodcreek Drive westbound / . ~~ ~ outbound) • Approximately 70~ of a fatal of 348 .lob s in Woodcreek anal `104 lots in Foxfire contributed to this total. -_; Evenin eak hour projections were also- made for this p ~! g ial tracts at that intersection- assuming. that the commerc ocation contr~-ute volume to Woodcreek Drive. Approx~rlately l 452 lots produce counterflaw volume to this :intersection ~'~~ Burin the evenin eak with the cornrnercial 16.5 acres g g p - - ~~~.~ The. of _traf f ic. contrbutin the largest percentage g ro'ectian for Woodcreek' Drive - westbound into this _1 `~.~ __ , intersection is 55a v/hr. --~ 15 ._~ _ `y ~_ ~ _._, 'i j ~~_ ~ E IUN lv TR~.FFIC Y ZS ~__~ The corice t of analysis used in this report is that of ~~ ~ ro ' ectons :have volume/Capacity Ratio . : ~'raff is :counts and p ~ been made far several intersections abutting thesubdvisian. ~~ These ra ' ectons have been compared with capacities of those p ~ intersections and the roadways adjacent thereto. Capacities have been estimated based on the 19~ iahway rapacity Manual, --, S ecal Re ort 209 Trans ortat'on Research Board. .-~ tonebroak Drive Intersection. with Woodcreek Drive -- Case 2 S "s inter ection will collect traffic from.. all reaches of Thy both the ro osed'and abutting subdivisions. Significant p p • char es-~.~ the volumes: at tie intersection can be expected as g -~ • lso .when the f ronta e the connections :are made- to Foxf ire and a !~ roads are made one wa The capacity of an intersection is Y • esent.. direetl related to the t e of traffic cor~tro y yp pr Traffic control should be placed on the' basis of a study ~ r"~ . ~ erfarmed at a i~en time, however, it is anticipated that p ~ , ~~ ~ e oint in the four way stop;. control w~.ll be requa.red at cam p ~ e This re ort: addresses the ultimate need for traffic f utur p ~ '• ~---' control and not the timing of application of a particular -'' traffic control strategy, The capacity of a four way stop controlled intersection depends, to some; extent, on the ~--, balance of traffic on the two .pairs of approaches . Imbalances ~~ do `not a11.aw drivers to use the intersection smoothly and `--~~~~ refore reduce ca -acit For this analysis a significantly .the p Y reduced. ca aclt has-been consldered:.:...glven the inflow/outflow P ~ n ~~ ~ ca acit ~ imbalances expected. for a 70~ / 30o..imbalance the p y ~~~.~ of a -four wa sto controlled interjection should be Y p ~ roxrnatel 1500 vehicles per haur~whch compares to a peak ~~ y ,_ ~, hour loading 'of 684 v/dir. The-capacity exceeds the projected . a :volume b `a s nfcant rna~gn. It is noted that. y g _ considerable percentage of traffic will be making right turns. at the intersection which should increase ..the expected ca acit N'a capacity deficiency is anticipated at this A Y - - intersection given four. way stop control. ~~ I~ stonebrool~ Drive Intersection with Rock:. Prairie Rflad -Case 2 ~~..I The abilit of Rock Prairie Road ~ the major roadway, to accept y _ I • ' ve has been anal zed the raffle loading from Stonebrook Dri y , '~ based on the assum Lion that the dominant movement wi1.1 be p ~ movement ti~ou l d • right turn from - Stonebrook Drive , and that thl s ' cted b conf oration. of the intersection. This be unrest:rl Y g r~ movement produces significant capacities based an typical .gap., ~~_-_, acce~ Lance values . ~~ The. :basic f actors in: determining the s p . roachs .eed and volu~:ne of capacity are criticalgap value,aPp P ~ ~~~ on the rna j or ~ he ~ throe ~ n movement, and. number of lanes t g '' raadwa A roach volumes are not ..known. far future Rock ~ pp _ ~ a . ~ oach s -eed of Prairie Road conditions, however, given an appr p ~ , ; a roxrnately 45 MPR, a critical gap value of ~ seconds and pP - ~I i ~~ _. ~ Stonebrook Drive of 20a v/hr, a volume of right turns from. ~~ ~- ~ ~ ~' ~~ 16 ,, ~ ,tl I._,._., I.. ~ ;f 'i ~' - .. ock Prairie Road would .have ~o exceed 8~0 v/h~ to present a ca acit deficiency. This would :require approximately 7040-- p Y __ ~ ~ . 8000 ADT on Rock Pralr~.e Road which should not be present for ~' ~__. ~ reseeable future iven that the existing volume is the f o g a roxirnatel 1300 v day. Additional capacity couldl be . pp Y / ~~ . generated by adding an acceleration lane for the right turning traf f is on Rock Prairie Road . This intersection would 'be step ~.~. oll~ed and should not produce a capacity deficient .contr ... - .. . condition for the foreseeable future. ,~ ~ ' 4 ~~-~ ~ , Woodcreek::`Drve Intersection wa.th the East Frontage Road ~ i __ r~ ~ e analsis of the Stohebrook Drive-Rock Prairie Similar to th y , ~; intersection this intersection will be do~natec~ by Rvad r ht turnip vehicles after one way operation becomes g ~ -~ - of the vehicles. ~ offect ~e.: Prior to that time a portion estimated to be 50: ~rcent, would be turning left to access p • :have been the Rock Pra~.r e Road interchange. Both instances ~- anal Zed far volume versus capacity. y , ~ '~_--~ a fronta e road o eraton deft` turns would typic,al'ly For two.. w y g p be the critical movement that .would determine the capacity of ' the intersection. Given two way frontage road operation (Case , j '~ ' a fift ercent s lit of westbound i~oodcreek Drive traffic 1 ~ , y p p ~_ turnip left onto the frontage road, and an existing vt~lume g of 885 far that movement approximately 325 vehicles pez~ d~,ay would make left turns with an opposing volume. of 1424 vehicles ~:~ ~ 4 g es . • per da northbound on the East. Fronta e Road These vo urn Y . represent present adjusted ADT. - Projected peak hour volume __ r~~ eek Drive westbound is 280 v/hr which would indicate on Woodcr ~~s 40 v hr of left aurns, Again- the concept. of critical. gap 1 / li or left ur pp g ~ ns aGCeptance is a livable. The critical a f _,, from a stop controlled tee intersection with an approach ~~peed 'i'~ . of 55 MPH would be approximately 7,5 seconds. This scenario ~ ~~ - would re uire that.. traffic on the frontage. road exceed 650 a raximatel 6000 v/day, to .present a capacity v/hr, or pp y ~' ~ ~ def cent -The existing ~tolume of 1050 v/day and the use of Y ' ~~-~ this:. cond~.tion wi 11_ not this facidl~ty indicate clearly that _ exist prior to the one way conversion of the frontage reads. ~~~' i ~ j For one way .frontage road operation Case z) the right turn .movement would be the critical movement to determines the r~ ~ ct of the intersection.: All Graf f is approaohng capa y ~' westbound an woodcreek Drive wou d be making right turns into the northbound traffic stream. The critical gap analysis ~ -- _ a lies to this situation. The projected right turn volume pp ~ ~ The critical a for ri ht for this ~.nter~ection is 550 v/hr.. g p g ~ ! pp~ turns- from a stop controlled intersection with an a roach ~ , -s eed of 55 MPH would be 6.~ seconds. This.. scenario would p ~, ~ ; ~ e road northbound exceed 4 5 0 require that .volume. on the. frontag ~~ correlates to a roximately 4104 v/day. ~~t is v/hr which ~p , i-~ unlikely that the volume on the East Frontage Road at tha.s opt would exceed 4100 v/day, although,... it is presumably p ~ an acceleration lane for this possible. It is .noted that 17 t 5 3 ~_ ~, ~ ~ L.~: ~ j ~ .::~ sEC~rzou v co~rcLUSZOr~s The rirnar urpose of this study was to assess the. gaff is p Y~ ~_ impact of `the development proposed in the Revised .Master. Plan _. for Woodcreek subdivision. The. preceding sections nc3~ude the ~~~~ technical basis for these conclusions and indicate that Chere s should ~e no detrimental' impact on the traffic situation 'in ~. ,.1 and around hi subdivision, :given that sound traffic engineering principles are applied in the design and operation of tie adjacent street system. This conclusion is based on ~~-~ the indications hat the critical intersections adjacent to the subdivision have the ability to accept the traffic D~~ enerated by the proposed development and the additional ,!~~ traffic volume that would be generated by the ohange~ in traf f io atterns b~:aught' about` by the connections to Foxf ire p ~----~ ;I ~ subdivision . `~~ ~ tud several assum tuns have been made.. 'these As with- .any s Y , assum bons are based on the best information available at p -M-, ~~ this time however, it is noted that these assumption, ,~ L~ :particularly those :about development patterns and land uses, can change with ..time. significant traffic generators should ~~~~ be studied on a case by case basis ~~for capacity; analysis. ! Assumptions made as to the configuration of on-site.. streets ,___. ~ _ I ~__ '. ~w. r _, i ~ 'a 19 _.~ i h { _ _-~ -.:. - ECTIt~N VI RECCE I~~T t~S ^~ Several recommendations are necessary to identify specific L__.-- assumptions that have been made as to configurations and o erational characteristics .:that affect the conclusions P , reached In this report. These recommendations are based on ~, information a~aila~leat this time .and may not be appropriate far all cond ions at all times. ~_ l . Sto control is the ~pprapriate method of traffic control p 1 4 on the minor street approaches to the East Frontage Road and Rock Prarie.Road _given existing and antci~>atod _~ C~ future conditions. 2. The operations of the intersection of Stonebrook ~tr~.ve -., with Rock Prairie Road will be very sgnf ic~~ntly 1 affected by the placement of driveways ~ particularly when -j' the school site development`is betted defined. ~~~ 1 3. When Stonebrook Drive is connected to Rock Prairie Road ~.~~~ the ri ht turn.. movement should be unrestricted; by parking g _ or left turning vehicles. Thls may require t e prov~.sion ~, for additional street width at this location or th'e {~ reservation of room within the right--of -way for the ~__: future addition of a rig~it turn lane. :The radius. of the i, curb should be generous to allow free sight turns. -~ 4. When the reali nment of Rock Prairie Road is des~~gned g j _ consideration shor~ld be given to improving the geometries `--~ of the curve near the intersection with Stonebrook Drive. ~ Additional consideration should be given to reserving ~~ ode uate ri ht-of-wa `for the possible future addition _ q g Y of a ri ht turn acceleration Iane at that intersection. g _ --' 5. Parkin along one sa.de of Stone rook -Drive may ~ rer~uire g _ re triction to al ow that street to function adequately as a collector street, especially near the intersection ,, _~_ i with Woodcreek Drive. ~~ ' 6. Placement of driveways for the commercial tracts adjacent ~ , ~ to the East: Frontage Road could have a signif cant ..impact ~ on the o eraton of the ir~tersectian at Woodcreek D~:'ve . ~~ Generous separation of driveways from- the intersection and limitation of driveway numbers could prove important. r ~~`~~ 7 i ' y -~ ~ ~' f-__~ f ~~~ ~~ I ~~J 1