Loading...
HomeMy WebLinkAboutADVANCE AUTO PARTS - PDP - 26-07 - REPORTS - TRAFFIC STUDY (3)ALDRIDGE TRANSPORTATION CONSULTANTS, LLC Page 6 of 6 The graphic above shows the proposed location of the shared driveway which is 15 feet offset north of the property line. There are no required improvements including building reconfiguration from the adjacent property owner. A joint access easement will allow the property owner to the south full use of the driveway and ensure its future use by both properties should the south side redevelop. The graphic above shows the problem with a shared driveway constructed to CDOT and City specifications. A 25 foot drive aisle would require the removal of the front 15 feet of the existing building. Also it is assumed that the right-of-way dedication, landscaping, and sidewalk requirements would be waived for the remainder of the property on the south side to preserve the small building that directly fronts on North College. +` ALDRIDGE TRANSPORTATION CONSULTANTS. LLC Page 4 of 6 Should you have any questions or need additional information please call me at 303-703- 9112. Thank you for the opportunity to be of service. Kind Aldri, John: Principal Jmwa/melatt. Consultants, LLC 'OE, AICP ALDRIDGE TRANSPORTATION CONSULTANTS. LLC Page 3 of 6 This facility is a low volume traffic generator. For comparison a typical fast food restaurant with a drive through window will generate over 100 trips in the PM peak hour vs. the 42 vph projected here. A drive in bank will generate over 200 trips in the PM peak hour. TRAFFIC DISTRIBUTION & ASSIGNMENT The distribution assumed, to be conservative, all of the traffic using the North College shared access. The entering left turn was programmed at 13 vph, the entering right turn at 8 vph. The exiting left turn was programmed at 8 vph and the exiting right turn at 13 vph. The existing condition with the site generated traffic is shown on the attached operations analysis. To project future 20 year future conditions, ATC factored the existing volumes by 1.27 per the CDOT website. This is considered conservative in developed areas. The 2027 PM peak hour is shown in the operations analysis worksheets that are attached. Please note the 2027 analysis is to meet code requirements. We are fully aware that the proposed long-term plans for North College in the ACP would not allow the access. TRAFFIC IMPACT ATC uses Synchro v.6 for operations analyses. The Synchro reports are attached for reference. For the PM peak hour analysis we are assuming a standard eight percent of daily volume and a 55/45 directional split, with the heavier movement in the northbound direction during the PM peak hour. The operations analysis shows that the critical movement at the access (northbound left turn out) will operate at LOS B during the PM peak hour for the existing plus site generated condition and in the future (2027) condition. The left turn in from North College will operate at LOS B in existing conditions with a 95th percentile queue length of 2 feet (25 feet is one vehicle). In 2027 it will continue to operate at LOS B with a 95th percentile queue length of, again, 2 feet. CONCLUSION & RECOMMENDATIONS Based on the site plan and operations analysis, the proposed full movement shared access will provide the site with efficient on and off site movement without compromising safety or traffic operations on North College. No improvements to the adjacent streets and intersections are occasioned by the project. In our opinion the shared access is in conformance with the ACP but its exact location on the property line is precluded by the existing buildings on the adjacent property. Our investigation finds that a 15 foot offset to the north, a joint access easement, and support of the long-term plans are consistent with the purpose and intent of the ACP and State Highway Access Code. Please let us know the best way to proceed on getting an access permit for this property. ALDRIDGE TRANSPORTATION CONSULTANTS, LLC Page 2 of 6 driveway on the property line and how the front 15 feet or more of building would have to be removed to allow a 25 drive aisle from the driveway. The second graphic shows how we propose to locate the driveway which is 15 feet offset from the property line. This would permit both properties to use the driveway. A joint access easement would be provided to ensure future use and in the event the south side property owner redevelops he/she would have that access available. It would also be possible to reconstruct the driveway to be on the property line if that makes sense in the future. We understand you're are concerned about this proposal and are recommending a design waiver for the 15 foot offset. This is obviously a hardship situation created by physical limitations. It is our opinion that the 15 foot offset will have no impact on the operations and safety of the roadway and that the proposed reconstruction of the frontage, dedication of right of way for the widening of North College, and landscaping features will, in fact, be a sizeable benefit to CDOT and the City. Furthermore, the developer and property owner are fully aware of the long-term plans in the ACP and supportive of them. This includes a possible raised median in the near -term that would restrict the access to a right in/right out and the ultimate condition where all access would be eliminated on this section of North College. The following is a traffic impact analysis for your consideration. EXISTING CONDITIONS In this area, North College is a four -lane roadway with a painted center left turn lane. It currently carries approximately 23,800 ADT (average daily traffic) according to 2004 CDOT counts. Hemlock is a two-lane collector type roadway. The intersection is full - movement and stop -sign controlled. PROPOSED LAND USE and TRIP GENERATION The proposed land use is auto parts sales. The estimated trip generation is from the Institute of Transportation Engineers Trip Generation Manual, 7th Edition. The following chart shows the trip generation for the weekday and the AM/PM peak hour. 843 Automobile Parts Sales KSF 7 61.91 1.10 1.11 2.93 3.05 433 8 8 21 21 Transportation T&nning andTraffic Engineering John M.W. Aldridge, PE, PTOE, AICP Colorado Registered Professional Engineer Professional Traffic Operations Engineer American Institute of Certified Planners May 10, 2007 Ms. Gloria Hiee-Idler Access Manager CDOT R-4 1420 2nd Street Greeley Colorado 80631 RE: Traffic Study Advance Auto — Ft. Collins, Colorado Dear Gloria: 1840 W. Uttleton Blvd., Suits B Uttleton, Co 80120 Tele: 303-703-9112 Fax:303-703-9152 Mobile:303-594-4132 Email: johnaldridge(rilgwest net This technical letter provides a study of the potential traffic impact occasioned by the development of an Advance Auto Store in Fort Collins, Colorado. The project site is located on the southwest corner of North College and Hemlock. The primary access to the site will be from a full -movement shared access on North College approximately 150 feet south of Hemlock. Secondary access will be available from an alley on the west side of the site. The site plan has been prepared in accordance with the City of Fort Collins Planning Department's guidelines that require the building to be located on the north side of the site and as close as possible to the eastern property line. The access to the site has been located per the US-287/SH-14 Access Control Plan (ACP) for the short-term condition. The allowed short term access to properties on North College is described in Figure 3-13 on Page 33 of the US-287/SH-14 Access Management Report. The ACP shows a shared driveway for this property and the adjacent property to the south and alley access to Hemlock. Direct access to Hemlock is precluded by the ACP and the building location. As we discussed at our recent meeting, the shared access to.North College cannot be located on the property line at this time due to the proximity of the existing buildings. Two graphics are attached for your reference. The first shows the location of the shared