2 - EIR18-01; DA18-01; GPA18-06; AA18-10_2525 N MAIN STREET

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Memorandum: The Addington Supplemental Traffic Impact Analysis D:\PROJECTS\RE - 2525 MAIN STREET\ANALYSIS OFFSET SEPTEMBER 2019 REVISED\MEMO SUPPLEMENTAL ANALYSIS.DOCX October 6, 2019 the transportation solutions company...based on trip generation rates from the Institute of Transportation Engineers' (ITE) Trip Generation (10th Edition) and are based on Land Use 221 – “Multi-family Housing (Mid-Rise)”. Table A shows the calculation of the project trip generation. As shown in Table A, the project is forecast to generate 100 a.m. peak hour trips, 123 p.m. peak hour trips, and 1,512 daily trips. Project Trip Distribution. As stated previously, the project access has been modified to include only one access point for the project at Main Street and Walkie Way-Santiago Park-Driveway. The trip distribution patterns for project trips were developed consistent with the trip distribution from the July 2018 TIA and modified to reflect only one project access at Main Street and Walkie Way-Santiago Park-Driveway. The project trip generation was applied to the trip distribution patterns for the proposed project to develop trip assignments for project trips. Table B lists the trip distribution by origin/destination. Figure 2 shows the trip distribution for project trips, and Figure 3 shows the trip assignment at the study intersections. METHODOLOGY The analysis will use the same methodology for traffic operations at all study area intersections, roadway segments, and freeway segments included in the July 2018 TIA. It should be noted that the intersection of Main Street and Walkie Way- Santiago Park-Driveway was analyzed in the July 2018 TIA using the Intersection Capacity Utilization (ICU) methodology to assess traffic operations. However, to account for the proposed signal timing and phasing, this intersection was analyzed using Synchro 10, which uses the Highway Capacity Manual 6th Edition methodology. The TIA submitted in July 2018 included the Main Street/Edgewood Road-I-5 HOV On/Off Ramp under existing conditions. The July 2018 TIA evaluated the ramp closures for opening year and 2040 scenarios, but the existing and existing plus project scenarios included the ramps since they were open when the Notice of Preparation (NOP) was released and counts conducted. Therefore, the same analysis parameters were used for the evaluation of Option E (Main Street and Walkie Way- Santiago Park-Driveway Access and Discovery Cube parking) conditions. The ramps have been permanently closed for construction as of April 2019. TRAFFIC VOLUMES The existing, opening year cumulative, and year 2040 without project traffic volumes were taken from the July 2018 TIA. The project traffic assignment was added to the without project traffic volumes to develop the Option E traffic volumes for existing, opening year cumulative, and year 2040 with project conditions. INTERSECTION LOS ANALYSIS Intersection level of service analyses were conducted for existing, opening year cumulative, and year 2040 with Option E conditions. The existing, opening year cumulative, and year 2040 with project Option E levels of service are shown in Tables C, D, and E. As shown in Tables C, D, and E, the intersections are projected to operate at the same or better levels of service as under Option B (Santiago Park-Walkie Way Project Access) from the July 2018 TIA. Therefore, the intersection levels of service under Option E are forecast to be the same or better than the findings disclosed in the July 2018 under Option B (Santiago Park-Walkie Way Project Access). ROADWAY SEGMENT LOS ANALYSIS Roadway segment level of service analyses were conducted for existing, opening year cumulative, and year 2040 with Option E conditions. The existing, opening year cumulative, and year 2040 with project Option E levels of service are shown in Tables F, G and H. As shown in Tables F, G, and H, the roadway segments are projected to operate at the same or better levels of service as Option B (Santiago Park-Walkie Way Project Access) from the July 2018 TIA. Therefore, the roadway segment levels of service under Option E are forecast to be the same or better than the findings disclosed in the July 2018 under Option B (Santiago Park-Walkie Way Project Access). 2-224