75B - PH - TUSTIN AND 4TH ST - Laserfiche WebLink

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6.0 FUTURE TRAFFIC CONDITIONS 6.1 Ambient Traffic Growth Horizon year, background traffic growth estimates have been calculated using an ambient traffic growth factor. The ambient traffic growth factor is intended to include unknown and future cumulative projects in the study area, as well as account for regular growth in traffic volumes due to the development of projects outside the study area. The future growth in traffic volumes has been calculated at one percent (1.0%) per year. Applied to the Year 2017 existing traffic volumes, this factor results in a 2.0% growth in existing volumes to the near-term horizon year 2019. 6.2 Cumulative Projects Traffic Characteristics In order to make a realistic estimate of future on -street conditions prior to implementation of the proposed Project, the status of other known development projects (cumulative projects) within a two-mile radius of the proposed project has been researched at the City of Santa Ana and City of Tustin. With this information, the potential impact of the proposed Project can be evaluated within the context of the cumulative impact of all ongoing development. Based on our research during the scoping process, there are sixteen (16) cumulative projects in the City of Santa Ana and eight (8) cumulative projects in the City of Tustin that are being processed for approval. These twenty-four (24) cumulative projects have been included as part of the cumulative background setting. Table 6-1 provides a brief description for each of the twenty-four (24) cumulative projects. Figure 6-1 graphically illustrates the location of the twenty-four (24) cumulative projects. These cumulative projects are expected to generate vehicular traffic, which may affect the operating conditions of the key study intersections. Table 6-2 summarizes the trip generation potential for all twenty-four (24) cumulative projects on a daily and peak hour basis for a typical weekday. As shown, the cumulative projects are expected to generate 30,720 daily trips, with 2,501 trips (1,176 inbound, 1,325 outbound) anticipated during the AM peak hour and 2,962 trips (1,506 inbound, 1,456 outbound) produced during the PM peak hour. The AM and PM peak hour traffic volumes associated with the twenty-four (24) cumulative projects in the Year 2019 are presented in Figures 6-2 and 6-3, respectively. Figure 6-3 also presents the daily related project traffic volumes. 6.2.1 Year 2019 Traffic Volumes Figures 6-4 and 6-5 present the AM and PM peak hour cumulative traffic volumes (existing traffic + ambient growth + cumulative projects) at the four (4) key study intersections for the Year 2019. Figure 6-5 also presents the Year 2019 daily cumulative traffic volumes. Figures 6-6 and 6-7 illustrate the Year 2019 forecast AM and PM peak hour traffic volumes, with the inclusion of the trips generated by the proposed Project. Figure 6-7 also presents the Year 2019 daily cumulative plus project traffic volumes. 75B-91