The URL can be used to link to this page

Home My WebLink About2012-03-20 Planning Board Supplemental Materials (128)DJK Dermot J. Kelly Associates, Inc. Traffic Engineering/Transportation Planning 280 Main Street, Suite 204 North Reading, MA 01864-1300 978-664-2205 MEMORANDUM TO: Mr. George Hughes FROM:Dermot J. Kelly, PE JEFFCO, INC. DJK Associates, Inc. P. O. Box 802 280 Main St., Ste. 204 Andover, MA 01810 North Reading, MA 01864 SUBJECT: 26 Main Street North Andover, MA Traffic Impact Analysis REF:824 DATE:February 6, 2011 Proposal DJK Associates, Inc. has conducted a Traffic Impact Analysis for the proposed construction of 8 Condominiums to be located at 26 Main Street east of the existing buildings located at 22-24 and 28-30 Main Street in North Andover, MA. A single standard 22-foot wide access driveway is proposed to connect to the 22-24 and 28-30 Main Street parcels in the center of the project parcel. The existing curb cut serving 22-24 and 28-30 Main Street parcels will be used a Common Driveway to provide access/egress for the proposed of 8 Condominiums to be located at 26 Main Street. As part of the proposed project two existing structures located on the lot will demolished. The existing on site conditions and the proposed project are graphically shown on the Existing Conditions Plan and the Site Plan prepared by Andover Consultants Inc. dated January 19, 2012. Vehicle-Trip Generation Study Traffic volumes generated by residential developments normally follow well-established patterns with respect to magnitude and temporal distribution. Measurements of numerous such developments published by the Institute of Transportation Engineers (ITE) have established trip generation rates, which have been standardized for analysis purposes. The rates at which residential projects generate vehicle-trips depend on the type of residential project; i.e., single- family units versus residential condominiums. Accordingly, the ITE Trip Generation Manual was researched with the appropriate vehicle-trip generation characteristics applied to the proposed project. Based on the Institute of Transportation Engineers (ITE) trip generation rates, it is anticipated that an 8-unit residential condominium development project would generate approximately 46 vehicle-trips per day (vpd). This daily volume would be split evenly with 23 vehicle-trips entering and 23 vehicle-trips exiting the site over the course of the entire 24-hour day. DJK Dermot J. Kelly Associates, Inc. Traffic Engineering/Transportation Planning Mr. Jeff Hughes February 6, 2012 Page 2 824-Mem2.docx; 2/6/12 More importantly, during the weekday morning peak hour, 8 residential condominium units would generate a total of 4 vehicle-trips per hour with 1 vehicle-trip entering and 3 vehicle-trips exiting the project site. Similarly, during the evening peak hour, it is anticipated that 4 vehicle- trips would be generated. The 4 vehicle-trips would consist of 3 vehicle-trips entering and 1 vehicle-trip exiting the development during the peak 60-minute period. The remaining vehicle- trips would occur over the course of the day. Table 1 summarizes the peak-hour and daily project-generated traffic volumes for the proposed 8-unit residential condominium development project as well as the total projected traffic volumes to be generated onto Main Street at the Common Driveway from both the existing structures and the proposed project. A total of 112 vpd would be generated by the existing structures and the proposed 8 Condominiums at the intersection of the Common Driveway with Main Street. During each of the morning and evening peak hours, a total of 13 vph would be generated at the intersection of the Common Driveway with Main Street. DJK Dermot J. Kelly Associates, Inc. Traffic Engineering/Transportation Planning Mr. Jeff Hughes February 6, 2012 Page 3 824-Mem2.docx; 2/6/12 TABLE 1 VEHICLE-TRIP GENERATION SUMMARY Time Period/ Direction of Travel 6,076 SF of Office/Specialty Retail Space a 8 Condominium Units b 6,076 SF of Office/Specialty Retail Space Plus 8 Condominium Weekday Morning Peak Hour Entering (vph) c 8 1 9 Exiting (vph) 1 3 4 Total (vph) 9 4 13 Weekday Evening Peak Hour Entering (vph) 2 3 5 Exiting (vph) 7 1 8 Total (vph) 9 4 13 Daily Traffic Entering (vpd) d 33 23 56 Exiting (vpd) 33 23 56 Total (vpd) 66 46 112 a Based on the Institute of Transportation Engineers (ITE) Trip Generation, 8th Edition, 2008 Land Use Code #710 General Office Building b Based on the Institute of Transportation Engineers (ITE) Trip Generation, 8th Edition, 2008 Land Use Code #230 Residential Condominium/Townhouse. c vph = vehicle-trips per hour. d vpd = vehicle-trips per day. DJK Dermot J. Kelly Associates, Inc. Traffic Engineering/Transportation Planning Mr. Jeff Hughes February 6, 2012 Page 4 824-Mem2.docx; 2/6/12 Mitigation Measures The final phase of the analysis process is to identify the mitigation measures necessary to minimize the traffic-related impacts of the project on the adjacent transportation system. The proponent has committed to implement all mitigation measures listed below, assuming all permits and approvals are obtained to construct the proposed project as well as all necessary permits and approvals to implement such mitigation and the project proponent proceeding to construction of the project: o Installation of a Stop sign at the intersection of the Existing/Proposed Common Driveway and Main is suggested to be considered. o To enhance the overall sight distance at the intersection of the Existing/Proposed Common Driveway with Main Street it is recommended that no roadside vegetation be planted within five of the adjacent sidewalk. 824-Mem2.docx; 2/6/12 PLAN REFERENCES o Existing Conditions Plan prepared by Andover Consultants Inc. dated January 19, 2012. o Site Plan prepared by Andover Consultants Inc. dated January 19, 2012.