Draft Environmental Impact Report - California Off Highway Vehicle ...

4.0 Cumulative Analysis
consider development of adjacent land that is tributary to each of the study intersections. For
example, future development of vacant land at the Oroville Municipal Airport will result in
increased use of Airport Park and Challenger Avenue, thereby directly affecting traffic projections
at the Larkin Road study intersections with these streets. This information has been used to
identify projected increases in peak‐hour traffic volumes during weekdays. For the Saturday
analysis, the existing relationship between weekday and Saturday traffic volumes was used to
forecast Saturday volumes for the 2030 planning horizon.
Identified Roadway Improvements
Planning documents that support projected long‐term traffic conditions have identified that
roadway improvements are needed to SR 162 and the SR 162/Larkin Road intersection. However,
initial roadway and intersection LOS calculations for the 2030 planning horizon do not assume
construction of these improvements. The initial calculations presented were determined by
considering existing circulation patterns. The improvement needs identified are summarized
below for informational purposes:
The City of Oroville 2030 General Plan Circulation Element indicates that widening SR 162
to four lanes from west of Larkin Road to SR 70 is required to maintain satisfactory
roadway and intersection operations for the 2030 planning horizon. Identified
improvements at the SR 162/Larkin Road intersection consist of adding traffic signals and
widening the intersection to provide the following geometrics:
Eastbound and westbound approaches—one left‐turn, two through, and one right‐turn
lane.
Northbound and southbound approaches—one left‐turn, one through, and one right‐turn
lane.
The Butte County General Plan 2030 Circulation Element indicates that widening SR 162 to
four lanes from Larkin Road to SR 70 is required to maintain acceptable LOS for the 2030
planning horizon. Unsatisfactory LOS E operations are projected without this improvement.
Caltrans’s SR 162 TCR indicates that the 20‐year concept for SR 162 is a two‐lane
conventional highway from the Glen County line to Wilbur Road, east of SR 99. East of
Wilbur Road to SR 70, the 20‐year concept is a four‐lane conventional highway with a
concept LOS D.
Analysis of 2030 Plus Project Conditions
The nearest cumulative project that could combine with traffic accessing Clay Pit SVRA and
therefore may have an influence on traffic operations near the SVRA is the Oro Bay Specific Plan.
This project is located approximately 0.75 mile west of the SVRA (Figure 4‐1). Figures 4‐2 and 4‐3
Clay Pit State Vehicular Recreation Area
February 2012 4-6 Draft EIR