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HomeMy WebLinkAboutSTEELE'S MARKET AT HARMONY MARKET PUD, 3RD FILING - FINAL - 54-87E - SUBMITTAL DOCUMENTS - ROUND 1 - TRAFFIC STUDY 411 III M h O °O MEMORANDUM 0 o 7, oac esi To : Denny Meyer, The Neenan Company 0 ..:, Greg Fisher, The Neenan Company u m Rick Ensdorff, Fort Collins Traffic Engineer o °' Ted Shepard, Fort Collins Planning Staff z From: Matt De 1 i ch '�j'''� J Date : August 3, 1990 . W z Subject : Steele ' s Market Traffic Study Update a a The Neenan Company has proposed to locate a Steele ' s a Market grocery store in the Harmony Market Shopping Center m in Fort Collins , Colorado. Steele ' s Market is a locally M owned grocery store serving the Fort Collins area for 50 M years . The store will initially be 45, 000 square feet with possible expansion to 55, 000 square feet . It will be located east of the recently approved Builder ' s Square store . Additional parking will be provided (300 parking spaces ) with this building. In the Harmony Market Site Access Study, March 1989, the land use assumed for Harmony Market was a shopping center with a gross leasable area of 332, 550 square feet . The - Pace Warehouse store was 100, 000 square feet. Trip generation for the Pace store was developed using data supplied by Pace . The trip generation for the remainder of the site was estimated using Trip Generation, 4th Edition, z ITE as a shopping center of greater than 200, 000 square w feet . Since a specific use has been determined for the Z Builder ' s Square and the Steele ' s Market, which are also z included in Trip Generation, 4th Edition, the generated w J trips were compared. Table 1 shows the trip generation o- > from the 88, 800 square foot store (Builder' s Square) and U the 74, 500 square foot store (Steele ' s Market) using the = z • generalized shopping center rate . The 74, 500 square foot ea o area comes from the Harmony Market PUD Site Plan which was W approved by the Fort Collins Planning & Zoning Board. That 0 m site plan shows the area proposed to be occupied by F. Steele ' s Market at 74, 500 square feet . Steele ' s Market has • a proposed that their store would be 45 , 000 square feet with °-` potential expansion to 55, 000 square feet . Therefore , the • trip generation from a 74, 500 square foot store (as a W u_ generalized shopping center) was compared to a grocery me g store of 45 , 000 and 55 , 000 square feet . Table 2 shows trip generation from the two specific uses , the Builder' s Square ec and the Steele ' s Market. The daily trips using the 2E specific gee i9 8 percent higher than that of the shopping center trip generation. The morning peak hour trips are T 411 about equal , while the afternoon peak hour trips increase by 47 trips (7%) . Table 1 Trip Generation Generalized Shopping Center Daily A.M. Peak P.M. Peak Land Use Trips Trips Trips Trips Trips in out in out Shopping Center 4840 79 47 176 198 88 . 8 KSF Shopping Center 4060 66 39 148_ 166 74. 5 KSF Total 8900 145 86 324 364 Table 2 Trip Generation Specific Uses Daily A.M. Peak P.M. Peak . Land Use Trips Trips Trips Trips Trips in out in out Builder' s Square 2715 123 75 127 122 88 . 8 KSF Steele ' s Market 45 KSF 5650 17 7 203 194 55 KSF 6900 21 9 248 238 Total (with 55 KSF 9615 144 84 375 360 grocery store) Trip generation characteristics at multi-use centers (such as Harmony Market) have, for many years, been a concern to the Trip Generation Committees at the Institute of Transportation Engineers . Specifically, questions have been raised about whether the trip generation characteristics of multi-use centers are the same as for the individual components of the center. It appears reasonable to assume that multi-use centers would potentially generate less external vehicular trips, because of the internal matching of trip ends within the center . • In addition, one trip to a multi-use center could satisfy a number of trip purposes at the same time . In an effort to gain some insight to multi-use center trip generation characteristics , the Colorado/Wyoming Section Technical Committee collected data at nine multi-use centers , I served on that committee and obtained data at a northern Colorado multi-use center that contained a grocery store . It was found that the trip generation estimate, using the individual components of the various centers , predicted travel that was higher than the actual driveway counts . The daily counts were approximately 7 percent higher . The morning peak hour was approximately 28 percent higher. The. afternoon peak hour was approximately 24 percent higher. Based upon this information, it is concluded that the range of differences indicated earlier in this memorandum is not significant . It is further concluded that the proposed Steele ' s Market is a use that is in line with the trip generation used in the Harmony Market Site Access Study . Access to the Pace Warehouse is via Boardwalk. Access to the site with the proposed Builder' s Square is proposed to be via Boardwalk (as exists now) and via a right-in/ right-out access to Harmony Road. This right-in/right-out access was included in the Harmony Market Site Access Study . With the Builder ' s Square proposal , Oakridge Drive will also be built between Lemay Avenue and Boardwalk. This will afford the opportunity for accesses to the Harmony Market from Oakridge Drive . With the Steele ' s Market store , access is proposed to Lemay Avenue and to Oakridge Drive . Peak hour traffic counts were obtained in May and July 1990 . These counts are shown in. Figure 1 along with daily traffic volumes supplied by the City of Fort Collins . Using the traffic volumes shown in Figure 1 and the existing geometrics , the Harmony/Boardwalk and Harmony/ Lemay intersections operate acceptably as shown in Table 3 . Calculation forms are provided in Appendix A. Table 3 Current Operation Intersection AM (delay) PM (delay) Harmony/Boardwalk B (9 . 9 sec/veh) B ( 10 . 0 sec/veh) (signal ) Harmony/Lemay B ( 11 . 2 sec/veh) B ( 10 . 4 sec/veh) (signal ) • 411 The generated trips from the proposed Steele ' s Market were assigned to the Harmony/Boardwalk, the Harmony right- in/right-out access , Harmony/Lemay, and Lemay/site access intersections . This assignment was added to the existing traffic , factored by 102 percent to determine the year 1991 traffic projection for the key intersections . The trip distribution was similar to that used for the short range assignment in the Harmony Market Site Access Study, except as it was adjusted based upon the counted traffic obtained in May 1990 . Figure 2 shows the trip distribution used for this traffic assignment. Figure 3 shows the 1991 peak hour traffic . The traffic assignment in the site access study assumed a passby factor of 40 percent for the shopping center use as documented in Trip Generation, 4th Edition. In this assignment, the passby factor was assumed to be 10 percent for the Builder ' s Square and 28 percent for Steele ' s Market . This is reflected in the traffic volumes shown in Figure 3 . In addition, the 1991 projections show that the volumes on Harmony Road were balanced . Since the counts shown in Figure 1 were collected on different days , matching volumes on Harmony Road was remote . Table 4 shows the peak hour operation at the key intersections . Calcula- tion forms are provided in Appendix B. The operation at all key intersections is acceptable . There is no signifi- cant increase in delay at the Harmony/Boardwalk or the Harmony/Lemay intersections . The two stop sign controlled intersections will not experience significant delay. When significant delays are experienced by the left-turn exits at the Lemay/access intersection, a signal will likely be warranted at the Lemay/Oakridge intersection. This is discussed in detail in the Harmony Market Site Access Study . When this signal is installed, the left-turn exits at the Lemay/access intersection will have a safe, Table 4 1991 Operation Intersection AM (delay) PM (delay) Harmony/Boardwalk B ( 10 . 4 sec/veh) B ( 10 . 7 sec/veh) (signal ) Harmony/Lemay ( signal ) B ( 11 . 3 sec/veh) B ( 12 . 1 sec/veh) Harmony Right-in/ Right-out NB RT A A Lemay/Access EB LT A D EB RT A A NB LT A A • convenient alternative exit from the Harmony Market . It is recommended that the Lemay/access intersection continue as a full turn, stop sign controlled intersection. When additional proposals are put forth at Harmony Market, similar traffic study updates should be prepared to examine the operation at existing intersections to determine when additional roadway facilities are required. The only new accesses planned with the Steele ' s Market store are the Lemay access and two accesses to Oakridge Drive . Oakridge Drive is designated as a collector. ThY two driveway accesses to it are spaced to provide good separation and adequate storage of turning vehicles . The Lemay/access intersection should have two exit lanes (a left-turn lane and a right-turn lane) . An auxiliary turn lane should be provided on southbound Lemay Avenue approaching this intersection. It is expected that Lemay Avenue will be posted at 35-40 mph in the future . Using the higher speed, this auxiliary lane should be 370 feet including taper, according to City of Fort Collins design standards . This auxiliary lane will be 270 feet including taper, given its proximity to Harmony Road. Vehicles in this auxiliary lane will not be required to stop, but will make the right turn at a reduced speed that will be governed by the radius of curb return. A 20 foot radius will allow a turning speed of 5-10 mph. A 40 foot radius will allow a turning speed of 15 mph. With a 15 mph turning speed, 295 feet of auxiliary lane and taper are needed . This is very close to the available 270 feet. Even with the 20 foot radius , the 270 feet exceeds the deceleration distance of 230 feet necessary to comfortably • slow a vehicle from 40 mph to 5 mph as shown in A Policy on Geometric Design of Highways and Streets , AASHTO, 1984 . This deceleration lane should have a minimum taper of 100 feet ( 10 : 1 for a 10 foot lane) with the remaining length as the full lane width. Storage distance is not required in this auxiliary lane . The northbound left-turn lane should provide for a minimum number of left turns entering at the Lemay/access intersection. The existing southbound left-turn lane on Lemay Avenue approaching Oakridge Drive is 155 feet plus 125 feet of transition area. From the end of this area to the center of the access driveway is 145 feet . This area should be used as the northbound left-turn lane at the access . RBD, Inc . has prepared a plan on Lemay Avenue which shows the proposed striping in this area. • AO' Counted in July 1990 in 0 per - c� 9 \— I I7/190 5S_9 36/14l0 f �4a5�93$ I �450161 2 4 HARMONY ) 3-7/7I I2/►�010 941/ 9 495 1/45 --y � \ 5(0/-75 —\ rjs o N Counted in May 1990 3 Q >- a 0 2 a -J 0 AM/PM 1990 PEAK HOUR TRAFFIC Figure 1 • • "� N -J a > o a 0 a O —J m • 55 /o , HARMONY -. 25% CID TRIP DISTRIBUTION Figure 2 • • 4.0O . N 1. 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