11-07-07-WS/PC - Laserfiche WebLink

Home Browse Search

per year background growth rate was applied to existing through volumes on County Road E and Lexington Avenue to establish 2009 no-build volumes. 3) 2009 post-redevelopment forecasts. Traffic volumes due to the existing office buildings were first removed from the 2009 no-build volumes at the subject intersections. Trip generation presented in Tables I and 2 for the proposed redevelopment represents gross trips. Due to the multi-use nature ofthe subject development, we expect that a portion of the trips generated by the various uses will occur internal to the site. To account for these internal trips, we reduced the gross trip generation for the proposed new retail uses by five percent to arrive at net trips, These net trips due to the proposed three new retail buildings were assigned to the two driveways based on expected directional distribution and location of each new building relative to the driveways. The following are our directional distribution percentages, which are based on the existing traffic patterns for Arden Plaza: . 30 percent to/from the north on Lexington A venue . 30 percent to/from the south on Lexington A venue . 25 percent to/from the west on County Road E . 15 percent to/from the east on County Road E Development volumes were then added to the 2009 no-build volumes to arrive at 2009 build volumes. Figure I shows traffic volumes for the two driveway intersections for the following scenarios: existing (2007), 2007 with full occupancy of existing uses, 2009 no- build, and 2009 build. 4) Traffic Analyses, Capacity analyses were completed at the subject intersections for all four of the above scenarios using the Synchro/SimTraffic 7 analysis software. Existing geometrics and traffic control were used in the analysis for all three scenarios, The driveway intersection on County Road E presently provides one left turn lane, one through lane, and one shared through/right turn lane on the east and west approaches. The north approach provides one lane for all movements. The south approach provides one shared through/left turn lane, and a short right turn lane, which provides an effective storage length of about 50 feet. The driveway intersection on Lexington Avenue is a T intersection that presently provides one through lane and one shared through/right turn lane on the north approach and one through lane and one left turn lane on the south approach. The west approach, which serves the Arden Plaza development, provides one left turn lane and a short right turn lane, which is about 50 feet long. The County Road E/Lexington A venue intersection is controlled by a traffic signal and provides one left turn lane, one through lane, and one shared through/right turn lane on all four approaches. Capacity analysis results are presented in terms of level of service (LOS), which ranges from A to F. LOS A represents the best intersection operation, with very little delay for each vehicle using the intersection, LOS F represents the worst intersection operation with excessive delay. LOS results for the subject intersections are presented in Figure 3 and are discussed in detail next. Synchro worksheets showing delay values and other key outputs are presented in the appendix, 8