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Home My WebLink AboutSTETSON CREEK, FIFTH FILING - PRELIMINARY - 16-89K - SUBMITTAL DOCUMENTS - ROUND 1 - TRAFFIC STUDY• w Ln o CO M • o 0 Q) o � a � 0 p o ti c) rn • X Q 0 LL z a J W 0 J T(^ • W W 0 N Q O) 0 z > o a r- 2 rn z w W z rJn V O N d ti N N W a z RX w w z U a z J W W 0 Q ■ O a V) z a cc W � U LL LL a cc CQ ~ G MEMORANDUM TO: Darwin Horan, The Writer Corporation Kimberly Meyer, Cityscape Urban Design Eric Bracke, Fort Collins Traffic Engineer Fort Collins Planning Department FROM: Matt Delich DATE: June 4, 1998 SUBJECT: The Townhomes at Stetson Creek traffic study (File: 9847ME01) The Townhomes at Stetson Creek is a 102 dwelling unit multi- family residential development, proposed to be located east of Timberline Road and north of Stetson Creek Drive in Fort Collins. The Townhomes at Stetson Creek consists of 3 two-plex buildings, 10 three-plex buildings, 4 four-plex buildings, and 10 five-plex buildings. A private swimming pool is included in this proposal. Accesses are proposed to Stetson Creek Drive approximately 200 feet east of Timberline Road and 800 feet east of Timberline Road. This memorandum is an addendum to "South Timberline Properties Site Access Study," September, 1993. The" Willow Springs North Site Access Study," January 1997, was also used as a reference in the analyses contained in this memorandum. A brief technical memorandum rather than a detailed transportation impact study was prepared due to the small changes in trip generation. In the "South Timberline Properties Site Access Study," this parcel was proposed to have 58 single family dwelling units. With the proposal considered in this memorandum, there will be a net increase of 45 daily trip ends and 2 morning peak hour trip ends. There will be a decrease of 4 afternoon peak hour trip ends. The Townhomes at Stetson Creek will not change the traffic very significantly over that considered for the approved land use. The public street network in the area is being completed. Timberline Road is designated as an arterial street. Stetson Creek Drive is designated as a two-lane collector street. Battlecreek Drive lines up with Stetson Creek Drive and is also designated as a collector street. Timberline Road is built from the Timber -Creek/ Angelo intersection north to Harmony Road. The curb and gutter on the east side of Timberline Road is complete from south of Stetson Creek Drive through Timber Creek Drive. Stetson Creek Drive is built east of Timberline Road. Battle Creek Drive is under construction in conjunction with adjacent developing properties. Battle Creek Drive will connect with Keenland Drive on the west side of the railroad tracks in the future. There is stop sign control on both Stetson Creek Drive and Battle Creek Drive. There is a continuous sidewalk along the east side of Timberline Road to Harmony Road. There are gaps in the sidewalk system on the west side of Timberline Road, north of Battle Creek Drive. There are gaps in the pedestrian facilities along Harmony Road. There are sidewalks along Stetson Creek Drive. The existing sidewalks meet the design criteria of the city. The gaps in the pedestrian system will be completed when the adjacent properties in the area are developed. Figure 1 shows the peak hour traffic counts on Timberline Road just north of the Timberline/Timber Creek/Angelo intersection. Since this area is currently being developed, detailed intersection counts were deemed not to be relevant. Given the geometry at the Timberline/Stetson Creek/Battle Creek intersection, this intersection operates acceptably. Acceptable operation is defined as level of service D or better. This area is not served by the Transfort Bus System. There are on - street bike lanes on Timberline Road. The wide shoulders along Harmony Road provide a safe environment for bicycles. These lanes are part of the existing Fort Collins bikeway system, providing both east/west and north/south connectivity throughout the city. Stetson Creek Drive and Battle Creek Drive do not have striping. Both of these streets are wide enough to safely accommodate bicycles. When it is appropriate, bike lanes will be striped on Stetson Creek Drive in accordance with Fort Collins standards. Trip generation for the Townhomes at Stetson Creek is shown in Table 1. Trip ends were calculated using Trip Generation. 6th Edition, ITS. The calculated trip generation from the previous use is also shown on Table 1, along with the calculated difference. A simple comparison indicates that the proposed Townhomes at Stetson Creek will generate slightly more daily and morning peak hour trip ends and slightly less afternoon peak hour trip ends than reflected in the "South Timberline Properties Site Access Study." It should be pointed out that the absolute difference in trip generation is very small. Figure 2 shows the short range peak hour traffic at the Timberline/ Stetson Creek/Battle Creek intersection. This forecast includes the existing traffic, traffic from the recently approved developments to the south, continuing development east and west of Timberline Road, an increase in "other" traffic, and traffic from the Townhomes at Stetson Creek. This intersection will operate acceptably, except for eastbound left turns in the morning peak hour. Delays for minor street left turns are normal and expected at stop sign controlled intersections on arterial streets. Calculation forms are provided in Appendix A. In the long range future, there will be a signal at this intersection, which will operate acceptably as indicated in other traffic studies for developments in this area. As mentioned earlier, Stetson Creek Drive is a collector street. Based upon the new street standards, the cross section provides one travel lane in each direction and a 6 foot bike on each side. Between Timberline Road and the west access to the Townhomes at Stetson Creek, parking is not recommended. This site will connect directly to the bike lanes on Stetson Creek Drive, which connect directly to the bike lanes on Timberline Road. There are no "priority destination areas" as defined in the "Multimodal Transportation Level of Service Manual" within 1320 feet of the site. A Bicycle LOS Worksheet is provided in Appendix B, which indicates that this site meets the base connectivity requirements. Sidewalks will be built within and adjacent to the site. They will connect to the existing sidewalks on Stetson Creek Drive, providing pedestrian access to Timberline Road. It will also provide pedestrian access to the future commercial uses that will be along Harmony Road. However, these future commercial areas are greater than 1320 feet from the Townhomes at Stetson Creek. As the remainder of the Stetson Creek residential area develops to the east, pedestrian facilities will be completed connecting to the system in the Wild Wood area. A Pedestrian LOS Worksheet is provided in Appendix B. This area falls into the location area termed "other" and "school walking area." It is within 5280 feet of Preston Junior High School and the future Core School. As noted on the Pedestrian LOS Worksheet, when the sidewalk system is completed to the east, this site will meet the guidelines for school access. There will be no future destination areas within 1320 feet of the Townhomes at Stetson Creek. In the future, Transfort will have feeder service on Timberline Road. These routes are defined as having 30+ minute service. The Timberline Road route will be within a quarter mile of the site. Pedestrian facilities will/do connect directly to Timberline Road. Harmony Road will be an enhanced travel corridor. The Townhomes at Stetson Creek will meet the transit level of service guidelines. It is concluded that the "South Timberline Properties Site Access Study" addresses the traffic impacts with the proposed Townhomes at Stetson Creek. The trip generation forecasted for this proposal is in line with that forecasted in the site access study. Operation at the key intersections will be acceptable. Transit, pedestrian, and bicycle level of service criteria will be met. q 0 N ANGELO DRIVE BATTLE CREEK DRIVE RECENT PEAK HOUR ON TIMBERLINE ROAD RMONY ROAD a 0 w z .I Q w m H rn Ln 0 0 Ln TRAFFIC TIMBER CREEK DRIVE STETSON CREEK DRIVE AM/PM Rounded to the Nearest 5 Vehicles. Figure 1 • Land Use Table 1 Trip Generation Daily A.M. Peak Trips Trips Trips in out The Townhomes at Stetson Creek 102 Townhome D.U. 600 (Rate) (5.86) Previous Use 58 Single Family D.U. 555 (Rate) (9.57) Difference +45 Table 2 P.M. Peak Trips Trips in out 7 38 37 18 (0.07) (0.37) (0.36) (0.18) 11 32 38 21 (0.19) (0.56) (0.65) (0.36) -4 +6 -1 -3 Short Range Peak Hour Operation Level of Service Intersection eM PM Timberline/Stetson Creek/Battle Creek (stop sign) EB LT/T E D EB RT A A WB LT/T B C WB RT A A NB LT A A SR LT A A Overall B A • N 0 O w z m w m F= ANGELO DRIVE HARMONY ROAD o - 50/30 BATTLE CREEK C) N + NOM. DRIVE i j �� /� 10/5 250/100 -� } 7 NOM. o 0 0 15/10 -� LLn 0 �i TIMBER CREEK DRIVE STETSON CREEK DRIVE AM/PM Rounded to the Nearest 5 Vehicles. SHORT RANGE PEAK HOUR TRAFFIC Figure 2 • • APPENDIX A HCS: Unsignalized Intersections Release 2.1f Page 1 Center For Microcomputers In Transportation University of Florida 512 Weil Hall Gainesville, FL 32611-2083 Ph: (904) 392-0378 Streets (N-S) timberline (E-W) stetson/battle creek Major Street Direction.... NS Length of Time Analyzed... 15 (min) Analyst ................... mjd Date of Analysis.......... 6/3/98 Other Information........ am pm short Two-way Stop -controlled Innsrsection -------------- Northbound Southbound Eastbound Westbound L T R I L T R I L T R I L T R No. Lanes 11 1 < 0 1 1 1 1 1 0 > 1 1 1 0 > 1 1 Stop/Yield Volumes PHF Grade MC' s (%) SU/RV's (%) CV s (%) PCEIs N 5 360 5 .95 .95 .95 0 1.10 --------------- N 15 290 90 .95 .95 .95 0 11.10 --------------- 250 1 15 .95 .95 .95 0 1.10 1.10 1.10 --------------- Adjustment Factors 10 1 50 .95 .95 .95 0 1.10 1.10 1.10 --------------- vehicle Critical Follow-up Maneuver Gap (tg) Time (tf) - ----------------------------------------------------------- Left Turn Major Road 5.00 2.10 Right Turn Minor Road 5.50 2.60 Through Traffic Minor Road 6.00 3.30 Left Turn Minor Road 6.50 3.40 HCS: Unsignalized Intersections Release 2.1f Page 2 Worksheet for TWSC Intersection -------------------------------------------------------- Step 1: RT from Minor Street WB EB -------------------------------------------------------- Conflicting Flows: (vph) 382 305 Potential Capacity: (pcph) 887 970 Movement Capacity: (pcph) 887 970 Prob. of Queue -Free State: 0.93 0.98 ---------------------------- --------------------------- Step 2: LT from Major Street SB NB ------------------------------------------------------ Conflicting Flows: (vph) 384 400 Potential Capacity: (pcph) 1125 1105 • Movement Capacity: (pcph) 1125 1105 Prob. of Queue -Free State: 0.98 0.99 -------------------------------------------------------- Step 3: TH from Minor Street WB EB -------------------------------------------------------- Conflicting Flows: (vph) 802 710 Potential Capacity: (pcph) 414 463 Capacity Adjustment Factor due to Impeding Movements 0.98 0.98 Movement Capacity: (pcph) 405 453 Prob. of Queue -Free State: 1.00 1.00 -------------------------------------------------------- Step 4: IT from Minor Street FIB EB -------------------------------------------------------- Conflicting Flows: (vph) 716 734 Potential Capacity: (pcph) 408 398 Major LT, Minor TH Impedance Factor: 0.98 0.98 Adjusted Impedance Factor: 0.98 0.98 Capacity Adjustment Factor due to Impeding Movements 0.96 0.92 Movement Capacity: (pcph) -------------------------------------------------------- 393 365 Intersection Performance Summary • Avg. 95% Flow Move Shared Total Queue Approach Rate Cap Cap Delay Length LOS Delay Movement (pcph) (pcph) (pcph)(sec/veh) (veh) ------- (sec/veh) -------------- -------- ------ ------ ------ EB L 289 365 > 365 ------- 38.9 6.2 E EB T 1 453 > 36.9 EB R 18 970 3.8 0.0 A WB L 12 393 > 394 9.4 0.0 B WB T 1 405 > 5.3 WB R 58 887 4.3 0.1 A NB L 6 1105 3.3 0.0 A 0.0 SB L 18 1125 3.3 0.0 A 0.1 Intersection Delay - 9.3 sec/veh HCS: Unsignalized Intersections Release 2.1f Page 1 Center For Microcomputers In Transportation University of Florida 512 Weil Hall Gainesville, FL 32611-2083 Ph: (904) 392-0378 Streets (N-S) timberline (E-W) stetson/battleccreek Major Street Direction.... NS Length of Time Analyzed... 15 (min) Analyst ................... mjd Date of Analysis.......... 6/3/98 Other information ......... am short Two-way Stop -controlled Intersection Northbound Southbound Eastbound Westbound L T R I L T R I L T R I L T R No. Lanes I 1 1 < 0 1 1 1 1 1 0 > 1 1 1 0 > 1 1 Stop/Yield Volumes PHF Grade MC' s M ) SU/RV's ($) CV's W PCE's N 10 330 10 .95 .95 .95 0 1.10 --------------- N 50 465 225 .95 .95 .95 0 1.10 --------------- 100 1 10 .95 .95 .95 0 I1.10 1.10 1.10 --------------- Adjustment Factors 5 1 30 .95 .95 .95 0 1.10 1.10 1.10 --------------- Vehicle Critical Follow-up Maneuver Gap (tg) Time (tf) ------------------------------------------------------------------ Left Turn Major Road 5.00 2.10 Right Turn Minor Road 5.50 2.60 Through Traffic Minor Road 6.00 3.30 Left Turn Minor Road 6.50 3.40 HCS: Unsignalized Intersections Release 2.1f Page 2 Worksheet for TWSC Intersection -- ----------------------------------------------------- Step 1: RT from Minor Street WB EB Conflicting Flows: (vph) 352 489 Potential Capacity: (pcph) 918 783 Movement Capacity: (pcph) 918 783 Prob. of Queue -Free State: 0.96 0.98 -------------------------------------------------------- Step 2: LT from Major Street SB --------------- NB ---------------------------------------- Conflicting Flows: (vph) 358 726 Potential Capacity: (pcph) 1157 773 Movement Capacity: (pcph) 1157 773 Prob. of Queue -Free State: 0.95 0.96 -------------------------------------------------------- Step 3: TH from Minor Street WB EB -------------- ----------------------------------------- Conflicting Flows: (vph) 1142 911 Potential Capacity: (pcph) 274 363 Capacity Adjustment Factor due to Impeding Movements 0.94 0.94 Movement Capacity: (pcph) 256 339 Prob. of Queue -Free- State-1_00---------1_00 ------------------- ------------- Step 4: LT from Minor Street WB--- --- EB ------------------------------------------- Conflicting Flows: (vph) -- 912 922 Potential Capacity: (pcph) 314 310 Major LT, Minor TH Impedance Factor: 0.93 0.93 Adjusted Impedance Factor: 0.95 0.95 Capacity Adjustment Factor due to Impeding Movements 0.93 0.91 Movement Capacity: (pcph) -------------------------------------------------------- 293 283 Intersection Performance Summary Avg. 95% Flow Move Shared Total Queue Approach Rate Cap Cap Delay Length LOS Delay Movement (pcph) (pcph) (pcph)(sec/veh) (veh) ----- (sec/veh) --------- -------- ------ ------ ------ EB L 116 283 > 283 ------- 21.4 ------- 1.9 D EB T 1 339 > 19.9 EB R 12 783 4.7 0.0 A WE L 6 293 > 287 12.9 0.0 C WB T 1 256 > 5.5 WB R 35 918 4.1 0.0 A NB L 12 773 4.7 0.0 A 0.1 SB L 58 1157 3.3 0.0 A 0.2 Intersection Delay = 2.1 sec/veh • • • E APPENDIX B Multimodal Transportation Level of Service Manual LOS Standards for Development Review - Pedestrian Figure 6. Pedestrian LOS Worksheet project location classification: bTt�E-2 (enter as many as apply) description of applicable destination area level of service (minimum based on project location classification) destination area within 1320' classification including address (see text) L wy^.0 "O11" uostrvng. nrrr'S senuiry ]n cubes a -2� C— 5 TON J �SZ�usTr ro? fX) FUtU E Cor° ❑ nmrrncn actual proFwsed ❑ mn�tnnn 3 actual proposed monrnnn 4 actual proposed 40 City of Fort Collins Transportation Master Plan Muttimodal Transportation Level of Service Manual LOS Standards for Development Review - Bicycle Figure 7. Bicycle LOS Worksheet F I level of service - connectivity nm>inRan F;7-7.1proposed base connectivity: specific connections to priority sites: description of applicable destination area within 1,320' including address destination area classification (see text) p. 20 �1N City of Fort Collins Transportation Master Plan