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6A Page 20 ............. Mr. Jolm B aer .Jill/limy 20, 2006 ......~ Page 10f4 As previously stated, traffic conditions at the study intersections and freeway segments were analyzed for the weekday AM and PM peak hours of traffic. The AM peak hour of traffic is generally between 7;00-and 9:.00 AM, and the PM peak hour is typically between 4:00 and 6:00 PM. It is during these periods that the most congested traffic conditions occur on an average weekday. Traffic conditions were evaluated for the following scenanos: Scenario 1: Existing Conditions. Existing intersection traffic volumes were obtained from new manual tuming-movement counts conducted at the study intersections. Scena rio 2: Background Conditions. Background traffic volumes were estimated by adding to existing intersection peak hour vohmles the projected volumes from approved but not yet completed developments in the project area. The added traffic from approved developments was collected from data contained in previous traffic studies supplied by the City of Redwood City. Scenario 3: Prf?ject Conditions. Projected intersection traffic volumes with the project were estimated by adding to background traffic volumes the traffic generated by each of the potential project altematives. Project conditions for each development altemative were evaluated relative to background conditions in order to detemline potential intersection impacts due to the project. Project Trip Generation The magnitude of traffic added to the roadway system by a particular development is estimated by applying the applicable trip generation rates to the size of the development. The trip generation rates that were used were from the Institute of Transportation Engineers (ITE) manual entitled Trip Generation, Seventh Edition, 2003. Trip generation was estimated for the otlice project altemative (Altemative 1) and the residential project altemative (Alternative 2). There is an existing 60,000 sJ. office building on site that will be removed as part of the project. TIle office building has been vacant for over four years. Therefore, trip credits were not given for the existing building. Office Project Alternative On the basis of the ITE rates, it is estimated that 80,000 s.f. of office space would generate 1,123 daily trips, with 157 trips during the AM peak hour and 168 trips during the PM peak hour. Using the specified inbound / outbound splits. the office space would produce 138 inbound trips and 19 outbound trips during the AM peak hour, and 29 inbound trips and 140 outbound trips during the PM peak hour. Residential Project Alternative On the basis of the ITE rates, it is estimated that 100 residential units would generate 642 daily trips, with 52 trips during the AM peak hour and 60 trips during the PM peak hour. Using the specified inbound / outbound splits, the residential development would produce 9 inbound trips and 43 outbound trips during the AM peak hour, and 40 inbound trips and 20 outbound trips during the PM peak hour. Table I shows the project trip generation estimates for both the office and residential project altematives. ---"