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HomeMy WebLinkAboutTIMBERLINE - INTERNATIONAL - FDP210020 - SUBMITTAL DOCUMENTS - ROUND 1 - TRAFFIC STUDY (2)DELICH ASSOCIATES Traffic & Transportation Engineering 2272 Glen Haven Drive Loveland, Colorado 80538 Phone: (970) 669-2061 Fax: (970) 669-5034 MEMORANDUM TO: Shawn Palinkas, Ziggi’s Coffee Devin Ferrey, FR Corp Steve Steinbicker, Architecture West Steve Gilchrist/Nicole Hahn, Fort Collins Traffic Operations FROM: Matt Delich DATE: September 4, 2020 SUBJECT: Ziggi’s at Timberline Transportation Impact Study (File: 2057ME02) This memorandum constitutes a transportation impact study (TIS) for the Ziggi’s Coffee Shop at Timberline. The Ziggi’s at Timberline site is located in the northwest quadrant of the Timberline/International intersection in Fort Collins. The site location is shown in Figure 1. The site plan for Ziggi’s at Timberline is shown in Figure 2. The scope of this memorandum was discussed with Steve Gilchrist, City of Fort Collins Traffic Operations. A base assumptions form and related information is provided in Appendix A. Existing Streets This is a developing area of the City of Fort Collins. Therefore, much of the engineering street criteria do not meet current Fort Collins standards. The existing geometry at the Timberline/International intersection is shown in Figure 3. Timberline Road is classified as a four-lane arterial street on the Fort Collins Master Street Plan. Currently, Timberline Road has a two-lane cross section (with center median lane), south of International Boulevard. North of International Boulevard, Timberline Road has a two-lane cross section with no center median lane, for approximately 700 feet. There is a center median lane north of Crusader Street. At the Timberline/International intersection, Timberline Road has a northbound left-turn lane, one through lane in each direction, and a southbound right-turn lane. The Timberline/International intersection has stop sign control on International Boulevard. The existing speed limit in this area is 40 mph. International Boulevard is classified as a two-lane arterial street. Currently, International Boulevard only exists to the west of Timberline Road. At the Timberline/International intersection, International Boulevard has an eastbound left-turn lane and an eastbound right-turn lane. However, there is provision for an eastbound through lane at the intersection. There is no posted speed limit on International Boulevard. DELICH Ziggi’s at Timberline, September 2020 ASSOCIATES Page 2 Existing Traffic/Operation The peak hour traffic at the Timberline/International intersection is shown in Figure 4. Traffic counts at the Timberline/International intersection were obtained in August 2020. Raw traffic count data is provided in Appendix B. Using the volumes shown in Figure 4, the current peak hour operation at the Timberline/International intersection is shown in Table 1. Calculation forms for these analyses are provided in Appendix C. The Timberline/International intersection was analyzed using the unsignalized intersection techniques from the 2016 Highway Capacity Manual, 6th Edition (2016 HCM). A description of level of service for unsignalized intersections from the 2016 HCM is provided in Appendix C. Table 4-3 showing the Fort Collins Motor Vehicle LOS Standards (Intersections) is also provided in Appendix C. At unsignalized intersections, acceptable operation during the peak hours is defined as level of service D overall and level of service F for any approach leg for an arterial/collector, arterial/local, collector/local, and local/local intersection. As can be seen in Table 1, the Timberline/International intersection is currently meeting the Fort Collins operational criteria with existing control and geometry. Trip Generation/Trip Distribution/Trip Assignment In a memorandum dated August 12, 2020, trip generation for the Ziggi’s coffee shop was analyzed. It was determined that Ziggi’s Coffee franchise data should be used for trip generation purposes. This cited memorandum is provided in Appendix D. Trip Generation, 10th Edition, ITE was used to estimate the daily and peak hour trip generation for the Retail portion of the Ziggi’s at Timberline development. From these sources, the daily and peak hour trip generation as shown in Table 2. The trip generation resulted in 568 daily trip ends, 67 morning peak hour trip ends, and 33 afternoon peak hour trip ends. Passby trips were applied using the techniques in the Trip Generation Handbook, 3rd Edition. The trip distribution for the Ziggi’s at Timberline development is shown in Figure 5. Figure 6 shows the site generated peak hour traffic at the Timberline/International and Timberline/Site Access intersections. Background/Total Traffic Projections Background traffic projections for the short range (2025) future horizon were obtained by factoring the recent traffic volumes on Timberline Road and International Boulevard by two percent per year. Figure 7 shows the short range (2025) background peak hour traffic at the Timberline/International intersection. The traffic volumes generated by the proposed Ziggi’s at Timberline development were added to the background traffic volumes to produce the total traffic volume forecasts. Figure 8 shows the short range (2025) total peak hour traffic at the Timberline/International and Timberline/Site Access intersections. DELICH Ziggi’s at Timberline, September 2020 ASSOCIATES Page 3 Operation Analysis Table 3 shows the short range (2025) background morning and afternoon peak hour operation at the Timberline/International intersection. The Timberline/International intersection will meet the Fort Collins operational criteria with existing control and geometry. Calculation forms for these analyses are provided in Appendix E. Table 4 shows the short range (2025) total morning and afternoon peak hour operation at the Timberline/International and Timberline/Site Access intersections. The Timberline/International and Timberline/Site Access intersections will meet the Fort Collins operational criteria with existing/recommended control and geometry. Calculation forms for these analyses are provided in Appendix F. Geometry As an arterial street, Timberline Road needs to be widened from International Boulevard north to Crusader Street, to include a center median lane. Widening this area of Timberline Road could have significant impacts to properties to the north on both sides of Timberline Road. Widening would require right-of-way and cooperation from a number of property owners. As such, no center median lane is expected to be built in this segment in the near future. Figure 9 shows the recommended geometry at the Timberline /International and Timberline/Site Access intersections. Not having a left-turn lane on Timberline Road approaching the Site Access means that northbound left turns must be executed from the through lane. This can cause possible conflicts (rear-end accidents) with the northbound through traffic on Timberline Road. According to the analyses in Appendix F, the northbound left-turn queue at the Timberline/Site Access intersection is calculated at less than one vehicle during both peak hours. This means that only the one left-turning vehicle will conflict with the northbound through traffic on Timberline Road. The average delay for a left-turning vehicle is 9.8 seconds in the morning peak hour and 8.4 seconds in the afternoon peak hour. If this delay increases, the chance for a conflict with the northbound through traffic increases. Queuing Analysis for Ziggi’s Drive-thru Coffee Shop Figure 10 shows the queuing diagram for the drive-thru coffee shop. The highest trip generation occurs in the morning peak hour. According to the site plan, there will be one drive-thru window and two order boards. The single lane drive-thru aisle is approximately 160 feet long and can accommodate seven vehicles at a spacing of 23.5 feet per vehicle (front bumper to front bumper). The double drive-thru aisle with the two order boards is approximately 120-125 feet long (inside lane) and 145-150 feet long (outside lane), and can accommodate 11 vehicles total. A total of 18 vehicles can be in the queue without impacting the main parking lot. DELICH Ziggi’s at Timberline, September 2020 ASSOCIATES Page 4 Service time data in the morning peak hour was obtained from a Ziggi’s Coffee Shop in the northwest quadrant of the College/Trilby intersection. This Ziggi’s Coffee Shop had one drive-thru window and one order board. Ziggi’s Coffee has a goal of three minutes between ordering and finishing the transaction (exiting). At this location, the time between ordering and exiting was approximately 3.15 minutes. During the time spent between the order board and arriving at the window, the order will be prepared and be available at the window when the vehicle arrives. The service time with respect to the queuing analysis is the time spent at the service window. The data indicates that the average service time at the window is 79.6 seconds (1.33 minutes). In order to determine if the available 18 vehicle length queue is adequate, a queuing analysis, as described in Chapter 8 of Transportation and Land Development, ITE, 1988, was conducted. The results of the queuing analysis indicated that the 95th percentile longest queue, during the morning peak hour, would need to accommodate eight vehicles (7.58592 vehicles) at one time. The probability that there would be one or more vehicles in the queue is approximately 26.8 percent. Since the available length can accommodate 18 vehicles with no impact to the site, it is concluded that the drive- thru lane will accommodate the 95th percentile queue. Therefore, the queue will not extend out to the main parking lot, nor will it impact Timberline Road. Pedestrian/Bicycle Level of Service There are sidewalks along the east side of Timberline Road, south of International Boulevard. There are sidewalks on the north side of International Boulevard. There are no other sidewalks in the immediate area. However, the Ziggi’s at Timberline development is unlikely to produce much pedestrian traffic. There are bicycle lanes along Timberline Road. There are no designated bicycle lanes along International Boulevard. However, there is enough width in International Boulevard for approximately 700 feet from Timberline Road that bicycles can operate safely. Transit Level of Service Currently, this area is served by Transfort Route 14 along Timberline Road. There is a bus stop south of International Boulevard near Donella Court and to the north near Annabel Avenue. Conclusions It is concluded that the Timberline/International and Timberline/Site Access intersections will meet the Fort Collins operational criteria with existing/recommended control and geometry. As an arterial street, Timberline Road should have a center DELICH Ziggi’s at Timberline, September 2020 ASSOCIATES Page 5 median lane to accommodate left-turning vehicles. However, this improvement will not likely occur in the near future. As such, no center median lane is expected to be built in the near future. Since the northbound vehicles entering the site will be in the northbound through lane, there will be some delay to the through traffic. The results of the queuing analysis for the drive-thru lane indicated that the longest queue (95th percentile), during the morning peak hour would need to accommodate eight vehicles at one time. Since the combined minimum available length can accommodate 18 vehicles, it is concluded that the back of the queue will not conflict with the on-site circulation of the site or Timberline Road. It is respectfully requested that no further transportation analyses related to the proposed development of Ziggi’s at Timberline be required at this time. BURLINGTON NORTHERN RAILROAD Mulberry TimberlineVine International Lincoln 14 SCALE: 1"=1000' SITE LOCATION Figure 1 DELICH ASSOCIATES Ziggi's at Timberline TIS, September 2020 Page 6 SCALE: 1"=40' SITE PLAN Figure 2 DELICH ASSOCIATES Ziggi's at Timberline TIS, September 2020 Page 7 EXISTING INTERSECTION GEOMETRY Figure 3 DELICH ASSOCIATES Ziggi's at Timberline TIS, September 2020 Page 8TimberlineInternationalSTOP- Denotes Lane AM/PM RECENT PEAK HOUR TRAFFIC Figure 4 DELICH ASSOCIATES Ziggi's at Timberline TIS, September 2020 Page 9TimberlineInternational154/156278/57061/25622/41133/14 225/135 DELICH Ziggi’s at Timberline, September 2020 ASSOCIATES Page 10 TABLE 1 Current Peak Hour Operation Intersection Movement Level of Service AM PM Timberline/International (stop sign) EB LT F (50.3 secs) D EB RT D B EB APPROACH D B NB LT B A OVERALL A A TABLE 2 Trip Generation Using Ziggi’s Franchise Data Code Use Size AWDTE AM Peak Hour PM Peak Hour Rate Trips Rate In Rate Out Rate In Rate Out 820 Shopping Center 2.545 KSF 37.75 94 0.58 1 0.36 1 1.83 5 1.98 5 N/A Ziggi’s Coffee 0.624 KSF N/A 474 N/A 33 N/A 32 N/A 12 N/A 11 Total 568 34 33 17 16 TimberlineInternational 14 10%55%35%SCALE: 1"=600' TRIP DISTRIBUTION Figure 5 DELICH ASSOCIATES Ziggi's at Timberline TIS, September 2020 Page 11 AM/PM SITE GENERATED PEAK HOUR TRAFFIC Figure 6 DELICH ASSOCIATES Ziggi's at Timberline TIS, September 2020 Page 12 International 2/30/11/20/1 Timberline11/9-9/-523/8-20/-312/10 21/6 Site Access AM/PM SHORT RANGE (2025) BACKGROUND PEAK HOUR TRAFFIC Figure 7 DELICH ASSOCIATES Ziggi's at Timberline TIS, September 2020 Page 13TimberlineInternational170/172307/62967/28688/45436/15 248/149 AM/PM SHORT RANGE (2025) TOTAL PEAK HOUR TRAFFIC Figure 8 DELICH ASSOCIATES Ziggi's at Timberline TIS, September 2020 Page 14 International 170/172309/63267/29689/45636/16 248/149 Timberline11/9334/63923/8735/47912/10 21/6 Site Access DELICH Ziggi’s at Timberline, September 2020 ASSOCIATES Page 15 TABLE 3 Short Range (2025) Background Peak Hour Operation Intersection Movement Level of Service AM PM Timberline/International (stop sign) EB LT F (76.4 secs) E (41.5 secs) EB RT E (39.7 secs) B EB APPROACH E (44.4 secs) C NB LT B A OVERALL A A TABLE 4 Short Range (2025) Total Peak Hour Operation Intersection Movement Level of Service AM PM Timberline/International (stop sign) EB LT F (77.8 secs) E (42.3 secs) EB RT E (40.0 secs) B EB APPROACH E (44.8 secs) C NB LT B A OVERALL A A Timberline/Site Access (stop sign) EB LT/RT C C NB LT/T A A OVERALL A A AM/PM RECOMMENDED GEOMETRY Figure 9 DELICH ASSOCIATES Ziggi's at Timberline TIS, September 2020 Page 16 International TimberlineSite Access STOPSTOP SCALE: 1"=30' QUEUING DIAGRAM Figure 10 DELICH ASSOCIATES Ziggi's at Timberline TIS, September 2020 Page 17