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4.F Traffic/Access

• Compared to the V/C in the no project scenario, the V/C in the with-project condition
increases the mainline V/C by 0.02 or more (the freeway impact threshold specified
in the CMP).

(4) Regional Transportation System Impact

The CMP traffic impact analysis guidelines indicate a project impact on the regional
transportation system is considered to be significant when the following threshold is exceeded:

• The proposed project increases traffic demand on a CMP facility by 2 percent of
capacity or more (V/C > 0.02), causing LOS F (V/C > 1.00); or

• If the facility is already at LOS F, a significant impact occurs when the proposed
project increases traffic demand on a CMP facility by 2 percent of capacity or more
(V/C > 0.02).

(5) Transit Services

Although the County and SCT do not have established thresholds that relate to impacts
on transit service, for the purpose of this analysis impacts would be considered significant if the
following occurs:

• The proposed project would result in an increase in ridership that would require
additional facilities beyond those identified in the Transportation Development
Plan that cannot be met by existing or planned transit services; or

• Traffic generated by the proposed project would cause a significant delay along
existing and proposed transit routes.

b. Methodology

(1) Project Development Assumptions

The proposed project is evaluated for the year in which occupancy would occur and is
analyzed both singularly and together with the cumulative traffic from other known
developments planned to occur in the area that are referred to throughout this impact analysis as
“related projects.” The planned year of occupancy for the first phase of the project is 2011.
Baseline conditions are derived using actual peak hour traffic volumes (measured in 2007).
Although project occupancies are expected to begin in 2011, recognizing that the amount of time
to fully build out the project can vary and be dependent on market conditions at that time, it is

County of Los Angeles Department of Regional Planning Skyline Ranch Project
PCR Services Corporation July 2009

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PRELIMINARY WORKING DRAFT – Work in Progress