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HomeMy WebLinkAboutPINECONE PUD THE TOWER SHOPPES SONIC DRIVE IN PRELIMINARY - 60 91N - SUBMITTAL DOCUMENTS - ROUND 1 - TRAFFIC STUDYTraffic Impact Study Sonic Drive -In At Tower Shoppes PUD Fort Collins, Colorado June 24, 2005 Prepared for: Scott Beard 1015 West Horsetooth Rd, Suite 202 Fort Collins, CO 80526 G. OOPS o W/�� U; e N !� �3252 z Sonic Drive-in at Tower Shoppes O O O Table 2 — Trip Generation Land Use ITE Units Daily Total Trips Enter / Exit Distribution Code Trips Noon PM Noon I PM IN OUT IN , OUT Sonic Drive -In na 19 —1,900 269 112 122 147 57 55 bays 20% reduction for mode split and 380 54 22 24 29 11 11 pass -by Total —1,520 215 90 98 118 46 1 44 Development Trip Distribution and Assignment The next step in the traffic analysis for this development is to distribute and assign the new trips generated by the development onto the street network. This was accomplished by analyzing the existing traffic patterns within the study area, thmiking through likely destination and travel patbs, speaking with city staff, utilizing professional engineering judgaant and then applying the resultant distribution. Due to the restrictive turning movements at the existing access locations, inbound and outbound distribution percentages at those kxations are not the same. The distEibubm penCEILMM are shown m Figure 6 and 7. Figure 6 — Inbound Site Generated Trip Distribution Page 7 of 17 0 Sonic Drive -In at Tower Shoppes •so Figure 7 — Outbound Site Generated Trip Distribution The assignment of the site generated traffic to the surrounding roadways is based upon the distribution percentage and is shown in Figure 8 for the noon and evening peak hour periods of an average weekday. These assignments are made by applying the trip generation estimates of Table 2 to the trip distribution percentages of Figures 6 and 7. The noon and evening peak hour traiirc volumes are m vehicles per hoar E 1` •1. F • , `1iAi 1 e� 1 a 8 r site , E. FW/seSooBA RA. ° /917]o/tt ' sir sir Figure 8 — Site Generated Trip Assignment noon /pm mmeber of w7 in8 weluctes Page 8 of 17 Sonic Drive-in at Tower Shoppes o00 4. FUTURE TRAFFIC VOLUMES AND CAPACITY ANALYSIS Background Traffic Projections. Based upon the Larimer County Urban Area Street Standards, the short-term horizon year will be in 2010 and the longterm horizon will be 2025. 'Phis requires the background traffic (area traffic volumes) to be forecast to the horizon years. Based upon the scoping meeting, all existing area traffic will be increased by 1.5% per year to account for regional growth - Figure 9 and 10 show the non -site, or background traffic at the key intersections for the short-term horizon year of 2010 and the longterm horizon of 2025, respectively. site 2051 W9 201 to ,313 1. 3 xt/.2 1../l.]"'ns/ W E. HomebM Rd. ' eeim f `nim \ sir Figure 9 — 2010 Background Volumes noon/pm number ofturmng vehicles Page 9 of 17 Sonic Drive-in at Tower Shoppes ••0 's 1� t 0 Za i $II2 / e E. Flasebatl, Rd- 2501 M7 : �t50/Ef ; I, R ufID 4 \ t 110fn �8{/n 1 t 3911 W3 18013" —IFf815 "Im"S ,101 F"W— _W9tIM uT1N/ro mt. sir Figure 10 — 2025 Background Volumes noon /pm number ofwmng vekteles .Total Traffic Proiections ' The addition of the background traffic volumes in each time horizon to the site traffic results in the total expected traffic volumes at the key intersections. For the short -tam horizon, the turning volumes in Figure 9 were added to those in Figure 8. For the long-term horizon, background volumes in Figure 10 were added to those in Figure 8. The total traffic volumes are shown in Figure 11 for the short-term horizon and Figure 12 for the long-term ' horizon. Page 10 of 17 Sonic Drive -In at Tower Shoppes � � n I tE G I' tl F`+fOISY I iC ?Y w $S J O (O -all a Q ' 1 site 1 e E Hasefoaft Rd. f f f lr I 2251278 `IDBFtH �/ ` gTA2O a 95/ro � lro r 513/483 r 1M/Mt �1 �16]/120 a M'"O =tIM r e583 1 1SIM rllro A �1t r • �/ 1i�' 1 Figure 11— 2010 Total Volumes I noon/pm numberofhu7nng vehicles I 0� 1115 E E F �12sm r I 1 -9 r t Site ! N I o E florseloa4l Rd. `1 US :3921l3 `1�t/82l MI. J �r r 180/5H� �ZNI152 n 1Tet/1136-� _BT9I1A! 1TW�roro 1 A/ro f41. pit � pit Figure 12 — 2025 Total Volumes U noon/pm number of burning vehicles Page 11 of 17 Sonic Drive -In at Tower Shoppes 009 Operational Analysis A Level of Service (LOS) analysis was completed at each of the intersections in both the noon and pm peak how. The LOS was calculated both without the project development (background only) and with the development traffic (total), allowing for a comparison between scenarios that will highlight the impact of the proposed development. 1 Figure 13 shows the LOS operational results analysis for the short-term (2010) background volumes. Figure 14 shows the LOS operational results for the short4c m trial volumes_ The wodmheds far this analysis, including delays and capacities are provided in Appendix E and F. Figure 15 shows the LOS operational results analysis for the long-term (2025) background vohmres_ Figure 16 shows the LOS operational results for the total volumes_ The wodsheets for this analysis, including delays and capacities are provided in Appendix G and H. An acceptable level of service is considered to be an overall LOS D for signalized intersections and LOS E on any approach leg or movement For a non —signalized m1crsectim is an urban environment between an arterial and local road, a LOS F is considered normal. All the intersections have an arterial component and operate at an acceptable level both with and without the development m the 2010 and 2025 time horizon_ Figure 13 — 2010 Background LOS noonlpn Page 12 of 17 I m Sonic Drive -In at Tower Shoppes 000 DID I. • d WD VV ML LOSC/D Figure 14 — 2010 Total LOS noon/pm ga vo3 =ax sae i.{ � u ' CE DIE � �V fDfE D O U f� LOS D! D IRA / 92 E HOmdOCM Rd Figure 15 — 2025 Background LOS noon/pm Page 13 of 17 c O V V iddL � male D o fl1l�. DIE `C DIE J`=1:tl DIE E W D O V Int LOSD/D e Sonic Drive-in at Tower Shoppes 000 E. Halsetooal Rd. y. � V s I f um Figure 16 — 2025 Total LOS and Geometrics noon/pm Geometry The existing geometrics were derailed in Figure 4. The same geometries were applied in the short-term T time horizon —In.the•long-term Um horizon, Timberhm Road was assumed to be a six -lane fatality as shown in the Master Street Plan. The geometries are shown in Figure 16 and are acceptable. As the rema,. a i—n_g portions of the Tower Shoppes PUD develop, westbound right turning volumes at the access along Horsetooth willcorrtmue to increase. Although not necessary to achieve good levels of service, a future right turn deceleration lane may be appropriate. 5. MULTI -MODAL LEVEL OF SERVICE ANALYSIS The proposed development is a Drive -In Restaurant development located in southwest Fort Collins. The surrounding area is substantially developed and is in an area where multi -modal amenities for pedestrians and bicycles abound_ pedestrian Level of Service Analysis The study area for pedestrians is by definition destinations drat are within 1320 ft of the proposed development. This area is shown on the map in Appendix I. Potential destinations include the High School, the English Ranch residential development to the south, and the business / coanmmmial area to ft PaW 14 of 17 Sonic Drive-in at Tower Shoppes 0 a • west. In addition, Linton Elementary School is included in the analysis as that is the closest elementary school and is located within the English Ranch subdivsion. The pedestrian LOS worksheet is provided in Appendix]. This area is considered a "school walk area" due to its proximity to Fort Collins High School- The standard Level of Service is C for visual interest and I B for all other factors. This level of service is satisfied for all categories. Direct, continuous and detached sidewalks are available to all the destinations. The signalize intersection at Horsetooth and Timberline includes pedestrian push buttons. ' Bicycle Level ofService Anal The bicvicee Level of Service Analysis is also included in Appendix I. The existing signed and striped bike ' lanes along both Timberline and Horsetooth provide a LOS A in all categories_ This meets the level of service standards for bicycles. Transit Level of ServiceAnalms There is not currently any transit service to this area of Fort Collins. However, the Multi -Modal Level of Service Manual indicates a fixture 2015 Transit System that includes "high frequency transit" west along Horsetooth and north/south along Timberline. 6. SPECIAL ANALYSIS AREAS During the course of the scoping meeting for this Traffic Impact Study, one area of special analysis was identified and is discussed below. Pedestrian Pedestrian St�l at Horsetooth and Arcuc Fox Horsetooth and Arctic Fox The intersection of East Horsetooth Road and Arctic Fox also serves as the main entrance for student parking at Fort Collins High School. During the morning (am) peak hour, there are heavy turning movements into the school access. Some students residing in the English Ranch subdivision walk or bike to school and utilize an existing striped cross walk on the west side of the intersection. See Figure IT The City of Fort Collins requested a special analysis of this condition in the am peak to determine whether a pedestrian signal is warranted. Figure 17 — Arctic Fox / Horsetooth Crosswalk Location Page 15 of 17 ' Sonic Drive -In at Tower Shoppes Morning peak hour turning movement counts were completed at the intersection. High School Access ' This included both vehicular and pedestrian/bike movements. They are shown in Figure 18. 1 The Manual of Uniform Traffic Control i Devices details in Section 4C.05 the 214 warrant for pedestrian signals and in 681 �sn Horsetooth Section 4C.06 the warrant for a school 10 ` ',,,— 2 crossing signal. The minimum standard indicates that the need for a traffic control ' signal should be considered if there is a minimum of 20 students during the peak hour (am). This warrant is not met at this location. Arctic Fox Figure 18 - am peak hour vehicle /pedestrian volumes at Arctic Fox /Horsetooth 7. CONCLUSIONS AND SUMMARY OF FINDINGS This study identified, documented and addressed the transportation impacts of the proposed Sonic Drive -In north east of the intersection of E. Horsetooth Road and S_ Timberline Road in south Fort Collins. The following conclusions can be drawn from the study: ■ The Some Drive -In is feasible from a traffic engineering standpoint. At full buildout, there will be 19 bays for vehicles. The project will generate approximately 1,5W vehicular trips daily, including 215 during the noon hour and 90 in the pm peak hour. The am peak hour is - — - ---nominal for the Sonic, and was not analyzed. ' The current operation at the key intersection of E. Horsetooth / S. Timberline as well as the two existing restricted movement accesses is acceptable with existing control and geometry. ■ The background traffic is assumed to increase at an annual rate of 1.5% due to regional growth. ■ The comparison of the traffic analysis between the background and total traffic in both the short-term time horizon (2010) and dic.long-term time horizon (2025) shows minimal impact due to the proposed development. ■ For the short-term time horizon, de existing geometry at the intersections will continue to provide acceptable levels of service, both with regional growth and the addition of this project_ ■ For the long-term time horizon, Timberline Road is assumed to be six -lane facility as shown in the Master Street Plan. With this geometry, the intersection will continue to provide acceptable levels of service, both with regional gtvwdn and the addition of this project. Page 16 of 17 Sonic Drive -In at Tower Shoppes • • s TABLE OF CONTENTS Section Description Page 1 Introduction................................................................................................................. Purpose and Process 2 Existing Conditions...................................................................................................... Locations and Surrounding Area — Land Use Existing Roadway System Existing Traffic Conditions Existing Traffic Operations Existing Pedestrian Facilities Existing Bicycle Facilities Existing Transit Facilities 3 Proposed Development................................................................................................. Development Type, Size, and Timetable Development Access Development Trip Generation Development Trip Distribution and Assignment 4 Future Traffic Volumes and Capacity Analysis............................................................. Background Traffic Projections Total Traffic Projections Operational Analysis Geometry 5 Multi -Modal Level of Service Analysis........................................................................ Pedestrian Level of Service Analysis Bicycle Level of Service Analysis Transit Level of Service Analysis 6 Special Analysis Areas..............•---......----...-•--•-......................-----............----......-......... Pedestrian Signal at Horsetooth and Arctic Fox 7 Conclusions and Summary of Findings........................................................................ Appendix A: Base Assumption Form Appendix B: Peak Hour Traffic Count Information Appendix C: Trip Generation Information Appendix D: Intersection Analysis Worksheets - Existing Appendix E: intersection Analysis Worksheets — Short Term Background Appendix F: Intersection Analysis Worksheets — Short Term Total Appendix G: Intersection Analysis Worksheets — Long Term Background Appendix H: Intersection Analysis Worksheets — Long Term Total Appendix I: Pedestrian / Bicycle / Transit Level of Service Analysis II 1 2 E Wo 14 15 16 Sonic Drive -In at Tower Shoppes ®® A ' Although not needed to achieve good levels of service, in conning years as the remaining portions of the Tower Shoppes PUD develop, consideration should be given to a westbound right turn deceleration lane at the access along Horsetooth Road. A proportioned cost sharing arrangement for the construction of the lane may be appropriate - Acceptable Levels of Service are achieved for pedestrians and bicycle based upon the n}eas"M in the multi -nodal transportation guidelines. Transfort does not currently provide serviceto the area. ■ And finally, as requested, an am peak hour study was completed to determine whether the warrant for a pedestrian signal at Arctic Fox and Horsetooth is met. The warrant is not q}ot; aqq ft peak time does not coincide with the peak traffic generation of the proposed Sonic' Dlive4n. Page 17 of 17 Sonic Drive-in at Tower Shoppes 000 Although not needed to achieve good levels of service, in coming years as the remaining portions of the Tower Shoppes PUD develop, consideration should be given to a westbound right turn deceleration lane at the access along Horsetooth Road. A proportioned cost sharing arrangement for the construction of the lane may be appropriate. ■ Acceptable Levels of Service are achieved for pedestrians and bicycle based upon the measures in the multi -modal transportation guidelines. Transfort does not currently provide service to the area ' And finally, as requested, an am peak hour study was Completed to determine whether the warrant for a pedestrian signal at Arctic Fax and Horsetoo th is met. The warrant is not met, and the peak time does not coincide with the peak traffic generation of the proposed Sonic Drive - In -Pap 17 of 17 I' Sonic Drive -In at Tower Shoppes •O• List of Tables Description Page 1 Level of Service Definition for Intersections.............................................................. 4 2 Trip Generation ........................................................................................................ 7 List of Figures Description Page 1 Vicinity Map............................................................................................................ 1 2 Existing Roadways and Neighboring Land Uses ........................................................ 2 3 Existing Peak Hour Traffic Turning Movement Volumes .......................................... 3 4 Existing Geometrics and Level of Service................................................................. 4 5 Site Plan.................................................................................................................. 6 6 Inbound Site Generated Trip Distribution Percentages ............................................... 7 7 Outbound Site Generated Trip Distribution Percentages ............................................ 8 8 Site Generated Trip Assignment................................................................................ 8 9 2010 Background Volumes....................................................................................... 9 10 2025 Background Volumes....................................................................................... 10 11 2010 Total Volumes ....................................... .............. ......... ....... .................. 11 12 2025 Total Volumes..................................................................0......................--...... 11 13 2010 Background LOS............................................................................................. 12 14 2010 Total LOS........................................ .......... ........................... ........... 0.............. 13 15 2025 Background LOS......................................................................................0...... 13 16 2025 Total LOS and Long -Term Geometrics..................... ....... :............................... 14 17 Arctic Fox / Horsetooth Crosswalk Locations...................................................4....... 15 18 AM Peak Hour Vehicles / Ped Volumes at Arctic Fox / Horsetoath ........................... 16 m Sonic Drive -In at Tower Shoppes 000 1. INTRODUCTION This document represents a transportation impact study for the proposed Sonic Drive -In development located in the Tower Shoppes PUD north -cast of the intersection of E- Hon;etooth Road and S. Timberline Road in south Fort Collins. See Figure I - Vicinity Map. Purpose and Process The purpose of this study is to address the existing and future capacity, geometric and control conditions of the transportation system and then determine the impact (and mitigation measures if necessary) of the traffic produced by the proposed development. This was accomplished by first: • Completing scoping information via several phone calls and a meeting on 6/9/05 with City of Fort Collins Traffic Engineer Eric Bracke to identify the study area and required analysis (scoping sheets included in Appendix A), ■ collecting existing traffic data, ■ analyzing the performance of the existing intersections, ■ projecting the existing volumes to the short-term horizon year of 2010 and the long-term horizon year of 2025, ■ analyzing the performance of the street network with future traffic volumes in place. second portion of the study included 10 �";—, jrr 1 n � k= Ngo tmalef wish AR S - COPY69M fO 1992-20DS EM lnc ■ determining the volumes of traffic to be generated by the Figure 1- Vicinity Map development, ■ adding these volumes to the background traffic identified above, ■ analyzing the intersections for site plus the background traffic, ■ comparing the function of the background analysis with the background + site analysis, ■ completing level of service evaluation of pedestrian, bicycle and transit modes, and ■ compiding a spacial study as requested during scoping for the need of a pedestrian signal at Horsetooth and Arctic Fox. The final step in the analysis is to identify impacts and specify required mitigation measures to accommodate the transportation impacts due to the development. Page 1 of 17 0 I 2. EXISTING CONDITIONS Sonic Drive -In at Tower Shoppes so* I Location and Surrounding Area - Land Use The location of the Sonic Drive -In is in south Fort Collins close to the intersection of East Horsetooth Road and South Timberline Road. See Figure I - Vicinity Map. The site is currently undeveloped and listed as ILot 4 of the Tower Shoppes PUD, which includes an ocisting McDonalds retaurant on a neighboring pad - The area is relatively flat (from a transportation perspective) and other area land uses include Fort Collins I High School to the north and east, residential housing to the south, business/commercial to the west, and Platte River Power Authority headquarters also to the west. There are other portions of the Tower Shoppes PUD that remain undeveloped. Figure 2 - Existing Roadways and Neighboring Land Uses Existing Roadway System The primary streets in the vicinity of the proposed development are South Timberline Road and East Horsetooth Road, which fronts the development. The roadways are shown in Figure 2 and typically include travel lanes, striped on -street bike lanes, curb and gutter, landscaped parkway and detached sidewalk_ Page 2 of 17 Sonic Drive-in at Tower Shoppes 0 • e South Timberline Road is currently a four -lane asphalt roadway and classified as a Major Arterial. The posted speed limit is 40 mph_ There are striped bike lanes and left turn auxiliary lanes on the north and south -bound approach to the signalized mtenection at Horseooth. East Horsetooth Road is a four —lane arterial also with a 40 mph speed limit. It contains two lanes in each direction and numerous auxiliary turn lanes at the approach to the signalized intersection at Timberline. There are striped bike lanes and an existing detached walk along the frontage of the proposed Sonic Drive - In. ' Existing Accesses. There are two existing accesses to the Tower Shoppes PUD. There is one access 400 ft. north of the Horsetoothai ilwi ne intersection that accommodates a % movement (right in, right out, i and left in) through the use of a center raised median. The other access is 550 ft. east of the Horsetooth/Iimberline intersection with only a right -in, teat movement (restricted by a center raised median). Horizontal alignments at both access are straight, and sight distance is not an issue. ' Existing Traffic Conditions The analysis of existing conditions provides insight into how the existing sired network is configured and how well it performs_ This m%rmation is useful in establishing baseline conditions. Peak hour (noon and pm) turning movement volumes at Horseooth / Timberline (counts completed by City staff in March 2005) and the existing access locations (May 2005) are shown in Figure 3. The additional intersection of Horseooth / Arctic Fox was counted as requested during the noon peak to identify high school traffic. Raw traffic data is provided in Appendix B. d 1�a �'' it • � =aV I i Sibe i i e E. HasetooA Rd. 1iL�a 1 pp�ygQ e, Wits , W. 1 \251. , ��s1xxsl 6d f,xsrws r ,s ,"s —� ssarcx ,s �e,sim 15f n r,. tine � $a? a a Figure 3 — Existing Peak Hour Traffic Turning Movement Volumes I_ (noon /pm fmn ng vo& Ws) Page 3 of 17 Sonic Drive -In at Tower Shoppes ••O Existing Traf is Operations In order to determine the function of the intersection in the study area, a level of service analysis was completed. The analysis is based on procedures outlines in the Highway Capacity Manual (HCM 2000) published by the Transportation Research Board (TRB). This type of analysis assigns a letter value based on average delay experienced by vehicles to indicate the level of service (LOS) of the intersection. The letter values assigned range from A to F with A being the best A summary and definition of each LOS letter designation is provided in Table 1 for bath unsoialiaed and signalized ink. Tahle I — T.evel nfSCervice nefinitian for Intersections Unsignalized Intersection Signalized Intersection LOS Average Delay (seelveh) A <-10.0 _4M.0 B >10.0 and —<15.0 >10.0 and -<20.0 C >15.0 and _<25.0 >20.0 and !�35.0 D >25.0 and �35.0 >35.0 and 555.0 E >35.0 and <_50.0 >55.0 and 580.0 F >50 >80 Source: HighwaycapacityManua{ Irmmsportationtterearchnoarq [uao /fluff` DID J `DID DID � DID , `DID o� , , m� Int. LOS C / D Figure 4 — Existing Geometrics and Level of Service (noon)"pm) rAINA � sir LL 0 Page 4 of 17 Sonic Drive -In at Tower Shoppes 000 Using the peak hour traffic shown in Figure 3, the peak hour operation based upon the existing geometrics is shown in Figure 4. Analysis sheets are included in Appendix D. The key intersections operate acceptably overall duriig both the noon and aftemoon peak hours_ Eristiny Pedestrian Facilities As can be seen in Figure 2, there is a comprehensive network of pedestrian facilities in the vicinity of the proposed development_ The vast majority of the sidewalks are detached walls. Along the frontage of the proposed development, there is an existing detached sidewalk. Existing &Lwle Facilities Bicycle lanes are striped (and signed) along both East Horsetooth and South Timberline Roads. Where exclusive right turn lanes are present, the bike lanes are skip -striped through the taper. Existing Transit Facilities Transfort, the City's transit service does not provide regular service to this area of Fort Collins. The closest bus route is Route #5 that operates along Lemay Avenue one mile to the west. 3. PROPOSED DEVELOPMENT Development Type. Size and Timetable The proposed Sonic is a "drive-in" restaurant with 19 parking bays. There is no drive4hrough_ For customers that prefer to eat outside tieir cars, there will be limited indoor and outdoor seating The timetable identified by the developer is for construction to begin during 2005, with full buildout anticipated within the next year. Per the Larimer County Urban Area Street Standards, the short-range _—time horizon used in the analysis is 2010, and the long-range time honzm is 2025_ A conceptual layout of the site plan is shown in Figure 5 on the following page. Development Access The access of the proposed development to the adjacent arterials will be via existing roadways and two existing access locations. See Figure 2. The access to South Timberline is a % access and the access to Horsetooth is limited to a right -in, right -out movement. The existing accesses already provide access to the existing McDonald retaurant just to the west, and will in the fixture provide access to other additional developments and lots within the PUD_ Pap 5ofn Figure 5 - Site Plan Development Trip Generation Sonic Drive-in at Tower Shoppes •00 In order to determine how many trips the proposed development will likely generate during the identified peak hours, the proposed trip generation characteristics were identified. This process is typically conducted using the histitute of Transportation Engineers (TTE) Trip Generation Manual, 7d'Edition. However, the TTE manual does not include a land use similar to a drive-in restaurant_ Therefore, as approved in the scoping meeting, peak how noon and pm entering and exiting traffic at the existing Sonic Drive -In along West Elizabeth street was counted (raw data prowled in Appendix Q. Then the size of the restaurant was compared and prorated to accommodate the higher number of bays proposed for this restaurant. With the proposed restaurant so close to the high school (and across the street from residential homes), some patrons are expected to walk, and therefore a 10% mode split reduction is mcluded. In addition, 1 o% pass -by percentage reflects time patrons who would have been utilizing the adjacent roadways without the development Pam. Trip generation is summarized in Table 2. Details are included in Appendix C. Page 6 of 17