Loading...
HomeMy WebLinkAboutCOUNTRY CLUB RESERVE - PDP - PDP170008 - SUBMITTAL DOCUMENTS - ROUND 1 - TRAFFIC STUDYEugene G. Coppola, P.E. P.O. Box 630027 Littleton, CO 80163 303-792-2450 Traffic Impact Study COUNTRY CLUB RESERVE Fort Collins, Colorado Transportation Impact Study COUNTRY CLUB RESERVE Fort Collins, Colorado Prepared For: Hillside Commercial Group 8020 S. County Road 5, Suite 200 Windsor, CO 80528 Prepared By: Eugene G. Coppola, P.E. P. O. Box 630027 Littleton, CO 80163 303-792-2450 December 6, 2016 Table of Contents I. INTRODUCTION .................................................................................................... 1 II. CURRENT CONDITIONS ...................................................................................... 3 A. Current Road Network ..................................................................................... 3 B. Current Traffic .................................................................................................. 3 C. Surrounding Land Uses ................................................................................... 6 D. Current Operating Conditions .......................................................................... 6 III. DEVELOPMENT ISSUES ...................................................................................... 7 A. Project Description ........................................................................................... 7 B. Site Traffic ........................................................................................................ 8 C. Trip Distribution ................................................................................................ 8 IV. AGENCY DISCUSSIONS ..................................................................................... 12 V. FUTURE CONDITIONS ....................................................................................... 12 A. Roadway Improvements ................................................................................ 12 B. Future Background Traffic ............................................................................. 12 C. Future Total Traffic ........................................................................................ 13 VI. TRAFFIC IMPACTS ............................................................................................. 13 A. Auxiliary Lane Requirements ......................................................................... 13 B. Auxiliary Lane Design .................................................................................... 18 C. Short-Term Operating Conditions .................................................................. 18 D. Long-Term Operating Conditions ................................................................... 20 E. Vine – Lemay Intersection ............................................................................. 22 VII. CONCLUSIONS .............................................................................................. 22 List of Figures Figure 1 Vicinity Map ............................................................................................... 2 Figure 2 Existing Roadway Geometry ...................................................................... 4 Figure 3 Current Traffic ............................................................................................ 5 Figure 4 Concept Plan ............................................................................................. 9 Figure 5 Site Traffic Distribution ............................................................................. 10 Figure 6 Site Traffic ................................................................................................ 11 Figure 7 Short-Term Background Traffic ................................................................ 14 Figure 8 Long-Term Background Traffic ................................................................ 15 Figure 9 Short-Term Total Traffic ........................................................................... 16 Figure 10 Long-Term Total Traffic ........................................................................... 17 Figure 11 Short-Term Roadway Geometry .............................................................. 19 I. INTRODUCTION Country Club Reserve is a residential development located in the southwest corner of the Douglas Avenue – Turnberry Road intersection in Fort Collins, Colorado. As currently planned, it will have 151 single family homes. A vicinity map is presented on Figure 1. This traffic impact study follows the established guidelines for such studies as are applicable and appropriate to the proposed project. The following key steps were undertaken as part of this study.  Obtain current traffic and roadway data in the immediate area of the site.  Evaluate current operations to establish base conditions.  Determine site generated traffic and distribute this traffic to the nearby street system.  Estimate roadway traffic for future conditions.  Evaluate operations with Country Club Reserve fully operational.  Identify deficiencies and recommend measures to minimize or mitigate the impact of site generated traffic. Key areas of investigation are documented in the following sections of this traffic impact study. Copyright © and (P) 1988–2012 Microsoft Corporation and/or its suppliers. All rights reserved. http://www.microsoft.com/streets/ 0 mi 0.2 0.4 0.6 0.8 Figure 1 2 VICINITY MAP SITE 3 II. CURRENT CONDITIONS A. Current Road Network The site is bordered on the north by Douglas Road (Douglas) and on the east by Turnberry Road (Turnberry ). Douglas and Turnberry are both arterial streets with one travel lane and a bicycle lane in each direction. Turnberry is under stop sign control at this intersection. The posted speed limits on Douglas and Turnberry adja- cent to the site are 45 MPH. Douglas extends east west from SH 1 to the I-25 Frontage Road. Turnberry extends from Mountain Vista Drive to the north of Douglas. Both Douglas and Turnberry are classified as two lane arterial streets in the Fort Collins Master Street Plan. Per the Master Street Plan, area roadways will undergo significant realignments in the future. This includes Mountain Vista Drive, Vine Drive, and Timberline Roads. These changes are expected to result in different traffic patterns in this area. The existing roadway system is shown on Figure 2. B. Current Traffic Peak hour traffic counts were conducted as part of this study at key intersections. Counts were undertaken from 7:00 – 9:00 AM and 4:00 – 6:00 PM representing typical morning and afternoon peak hours. Current peak hour traffic is shown on Figure 3. As indicated, peak hour traffic is currently modest. Count tabulations are available in Appendix A. 4 Country Club SH 1 Turnberry STOP STOP STOP 5 Country Club SH 1 67/91 67/44 48/51 6/0 74/52 41/40 51/183 7/45 147/148 41/165 44/183 8/25 28/35 2/4 10/23 16/65 88/322 14/61 178/79 309/158 24/11 7/1 1/3 0/1 247/134 207/85 0/2 20/5 31/13 0/4 9/19 22/65 5/15 3/1 53/52 36/33 LEGEND: AM/PM Peak Hour Daily Douglas Turnberry 6,575 6,100 1,310 1,240 1,730 6 C. Surrounding Land Uses The area surrounding Country Club Reserve is primarily composed of existing or planned residential land uses to the south and west. Minor residential development exists to the north with mostly vacant land to the east. D. Current Operating Conditions Highway Capacity Manual procedures, based on the 2010 Highway Capacity Manual, were used to quantify current intersection operations. Resultant levels of service (LOS) are indicated below for morning and afternoon peak hour conditions. Analyses were undertaken for the Douglas – Turnberry intersection. Traffic from Figure 3 was loaded onto the current roadway geometry, which is shown on Figure 2. For definition purposes, overall level of service (LOS) ‘E’ is considered the minimum acceptable LOS with approaches and the individual traffic movements also allowed to operate at LOS ‘E’. This is typical of urban arterial – arterial stop sign controlled intersections during peak hours. At arterial street intersections with local and collector streets, the individual traffic movements and overall operations are allowed to drop to LOS ‘F’. 7 CURRENT OPERATING CONDITIONS Movement/ Level of Service Intersection Control Direction AM Pk Hr. PM Pk Hr. Douglas – Turnberry Stop EB All A A (N-S) WB All A A NB All A B SB All A A Douglas – Country Club Stop EB LT B B (E-W) EB R B A WB All B C Douglas – SH 1 Stop EB L C D (E-W) EB R B B WB L C C WB R B C NB L A B SB L A A As shown above, this intersection currently operates at level of service 'B' or better during peak hours. This represents very acceptable operations. Capacity work sheets are provided in Appendix B. III. DEVELOPMENT ISSUES A. Project Description Country Club Reserve is a single family residential development with about 151 single family residences. Construction will start as soon as practical with completion ex- pected in 3 – 4 years. 8 Site access will be provided two internal street full movement connections to Douglas. These intersections will generally align with the residential driveway along the north side of Douglas. A concept plan is presented on Figure 4. B. Site Traffic Site traffic was estimated using Institute of Transportation Engineers (ITE) publication, "Trip Generation, 9th Edition", a nationally recognized reference. The single family classification was selected to best represent this project as currently envisioned. Trips associated with Country Club Reserve are indicated in the following table. Daily AM Peak Hour PM Peak Hour Land Use Size Rate Trips Rate In Out Rate In Out Single Family 151 D.U. 9.52 1,438 0.75 29 85 1.00 95 56 As shown above, Country Club Reserve is expected to generate 114 morning peak hour trips, 151 afternoon peak hour trips, and 1,438 trips per day. These trips are considered manageable. C. Trip Distribution Trip distribution is a function of the origin and destination of site users and the availa- ble roadway system. In this case, all traffic must use either Douglas or Turnberry to arrive at the site. The site traffic distributions shown on Figure 5 are based on the current roadway network and current traffic patterns in the area of this site. Resultant peak hour site traffic is shown on Figure 6 for both the morning and afternoon peak hours. F.O. EXISTING DRIVEWAY EXISTING DRIVEWAY E DOUGLAS RD TURNBERRY RD NORTH ( IN FEET ) 1 inch = ft. 200 0 200 Feet 200 Figure 4 CONCEPT PLAN 9 10 Country Club SH 1 Turnberry 15% 15% 30% Nominal 40% Nominal 15% 15% Country Club SH 1 Street B Street A 5/15 10/35 5/20 N/N 15/10 30/20 5/15 5/15 10/30 15/10 20/20 35/20 15/10 10/40 N/N N/N 15/10 15/10 5/15 5/30 5/15 N/N 15/5 35/25 LEGEND: AM/PM Peak Hour N = Nominal NOTE: Rounded to nearest 5 vehicles Douglas Turnberry 12 IV. AGENCY DISCUSSIONS Prior to commencing with this traffic impact study, key traffic engineering elements and key assumptions were discussed with Nicole Hahn and Martina Wilkinson, repre- senting the City of Fort Collins. Agreed upon items are identified below: 1. Traffic growth is estimated at 1% per year on streets serving this area. 2. The Water’s Edge development traffic estimates can be used in this study. 3. Given the planned uses, weekday morning and afternoon peak hours were de- termined worthy of investigation. 4. A full traffic impact study is appropriate for this development. The study should be based on the Scoping Sheets presented in Appendix A. The above items are fully considered in the following sections of this study. V. FUTURE CONDITIONS A. Roadway Improvements Fort Collins does not have any plans to improve Douglas or Turnberry at this time; however, both of these streets are designated as two lane arterials with a center left turn lane in the City’s Master Street Plan. B. Future Background Traffic Short-term (2021) and long term traffic was estimated using the estimates contained in the Water’s Edge West Traffic Impact Analyses, dated October 26, 2016. As directed by the City, traffic associated with the Water’s Edge development was in- 13 cluded in the background traffic estimates used in this study. Background traffic is present on Figures 7 and 8 for the short and long term time frames, respectively. C. Future Total Traffic Short-term and long-term total traffic was developed by combining site traffic and background traffic for those time frames. Total traffic is shown on Figures 9 and 10 for the short-term and long-term, respectively. VI. TRAFFIC IMPACTS In order to assess operating conditions with Country Club Reserve fully operational, capacity analyses were conducted at the Douglas – Turnberry, Turnberry – Country Club, Douglas – SH 1, and site access intersections. Total traffic (the combination of background traffic and site traffic) was used in this effort. Short-term total traffic and long-term total traffic was reviewed to determine the need for future auxiliary lanes. The results of this review are discussed in the following section. A. Auxiliary Lane Requirements Traffic movements at the above noted intersections were reviewed. This effort fo- cused on the need for right turn and left turn lanes to accommodate site related turning vehicles in the short- and long-term time frames. This effort used LCUASS turn lane warrants. 14 Country Club SH 1 70/45 70/50 50/55 10/5 80/55 50/45 75/35 10/50 155/160 105/175 75/230 10/25 35/40 5/5 15/30 20/70 95/340 15/70 190/85 330/170 25/15 10/5 5/5 5/5 275/165 240/110 5/5 25/5 25/15 5/5 15/25 25/70 10/15 5/5 60/60 45/40 LEGEND: AM/PM Peak Hour N = Nominal NOTE: Rounded to nearest 5 vehicles Douglas Turnberry 15 Country Club SH 1 85/115 85/55 60/65 10/5 95/65 55/50 65/235 10/60 190/60 55/210 55/235 10/30 35/45 5/5 15/30 20/85 115/45 20/80 230/100 395/205 30/15 10/5 5/5 5/5 315/170 265/110 5/5 25/5 40/15 5/5 15/25 30/85 5/20 5/5 70/65 45/40 LEGEND: AM/PM Peak Hour N = Nominal NOTE: Rounded to nearest 5 vehicles Douglas Turnberry Country Club SH 1 Street B Street A 70/95 75/65 50/85 155/125 10/35 N/N 165/115 5/20 10/5 95/65 80/65 80/50 10/50 155/160 105/175 80/245 10/25 45/70 5/5 15/30 15/10 20/20 35/20 15/10 20/70 95/340 25/110 190/85 330/170 25/15 N/N N/N 10/5 5/5 5/5 290/175 255/120 5/5 25/5 25/15 5/5 15/25 30/85 N/N 5/5 80/130 5/30 90/125 5/15 10/15 75/65 80/65 LEGEND: AM/PM Peak Hour N = Nominal NOTE: Rounded to nearest 5 vehicles Douglas Turnberry Country Club SH 1 Street B Street A 85/115 90/80 60/65 175/140 10/35 N/N 185/130 5/20 10/5 110/75 85/70 70/250 10/60 190/60 55/210 60/250 10/30 45/75 5/5 15/30 15/10 20/20 35/20 15/10 20/15 115/45 30/120 230/100 395/205 30/15 N/N N/N 10/5 5/5 5/5 330/180 280/120 5/5 25/5 40/15 5/5 15/25 35/100 N/N 5/5 60/150 5/30 70/145 5/15 5/20 75/70 80/65 LEGEND: AM/PM Peak Hour N = Nominal NOTE: Rounded to nearest 5 vehicles Douglas Turnberry 18 Short Term: An eastbound right turn lane on Douglas at Turnberry. Westbound left turn lanes on Douglas at both site access points Long Term: No additional site related improvements B. Auxiliary Lane Design The site related auxiliary lane at the Douglas access point should be designed as indicated below assuming retention of the existing 45 mile per hour speed limit and a 12-foot wide turn lane. These parameters are subject to adjustment based upon findings and investigations during preliminary design. DESIGN PARAMETERS FOR AUXILIARY LANES Roadway Intersection Lane Taper Deceleration Total Length Douglas Street A WB LT 180’ 195’ 50’ 425’ Street B WB LT 180’ 195’ 50’ 425’ Turnberry C. Short-Term Operating Conditions Short-term operating conditions with Country Club Reserve fully built were evaluated using total traffic. This investigation used the peak hour traffic shown on Figure 9 and the short-term roadway geometry shown on Figure 11 and resulted in the future operating conditions shown below. Country Club SH 1 Street B Street A Douglas Turnberry STOP STOP STOP STOP 20 SHORT-TERM OPERATING CONDITIONS WITH PROJECT Movement/ Level of Service Intersection Control Direction AM Pk Hr. PM Pk Hr. Douglas – Turnberry Stop EB All A A (N-S) WB All A A NB All B B SB All A B Douglas – Country Club Stop EB LT C D (E-W) EB R B A WB All C C Turnberry – Street A Stop WB L A A (N-S) EB All A A NB All A A SB All A B Turnberry – Street B Stop WB L A A (N) NB All B B Douglas – SH 1 Stop EB L C B (E-W) EB R C C WB L C B WB R C C NB L A A SB L A A As shown, very acceptable operations can be expected with Country Club Reserve fully built in the short-term. Capacity work sheets are available in Appendix C. D. Long-Term Operating Conditions Long-term conditions were evaluated with the Country Club Reserve. This reflects the time frame when major roadway extensions and improvements are assumed available. Future levels of service were calculated using the long-term total traffic 21 shown on Figure 10 and the short-term roadway geometry which is assumed retained through the long-term timeframe. LONG-TERM OPERATING CONDITIONS WITH PROJECT Movement/ Level of Service Intersection Control Direction AM Pk Hr. PM Pk Hr. Douglas – Turnberry Stop EB All A A (N-S) WB All A A NB All B B SB All A B Douglas – Country Club Stop EB LT C F (E-W) EB R B A WB All C C Turnberry – Street A Stop WB L A A (N-S) EB All A A NB All A A SB All A B Turnberry – Street B Stop WB L A A (N) NB All B B Douglas – SH 1 Stop EB L D C (E-W) EB R C B WB L D C WB R C B NB L A A SB L A A As shown above, very acceptable long-term operating conditions are expected. Capacity worksheets are presented in Appendix D. 22 E. Vine – Lemay Intersection The City recognizes that remote developments may impact intersections near the core of Fort Collins. This development might modestly impact the Vine – Lemay intersection. During the critical afternoon peak hour an estimated 10 – 15 vehicles from Country Club Reserve might use the Vine – Lemay intersection, and therefore, the City’s APF criteria was evaluated at this location. Given Fort Collins’ APF excep- tion for projects adding fewer than 50 peak hour trips at this intersection, it can be determined that Country Club Reserve will not significantly impact the Vine – Lemay intersection. VII. CONCLUSIONS Based on the analyses, investigations, and findings documented in earlier sections of this report, the following can be concluded:  Current roadway operations in the area of the Country Club Reserve site are acceptable during all peak hour periods.  Site traffic associated with build out of Country Club Reserve is expected to be 114 morning peak hour trips, 151 afternoon peak hour trips, and 1,438 trips per day. These trips are considered modest.  An eastbound right turn lane is needed at the Douglas – Turnberry intersec- tion in the short-term as are left turn lanes on Douglas at both site access intersections.  Traffic operating conditions will be acceptable with the proposed develop- ment in both the short- and long-term time frames. 23  Site traffic expected to use the Vine – Lemay intersection is in the range of 10 - 15 morning and afternoon peak hour trips. This is considerably less than the City’s 50 vehicle exception and therefore, no meaningful site traffic impact is expected at this intersection.  Country Club Reserve is viable from a traffic engineering perspective. In summary, the traffic demands associated with Country Club Reserve can be easily managed. This is documented by the determination that acceptable operating condi- tions are anticipated in the vicinity of this development for the foreseeable future.