The Non-CEQA transportation assessment for the City of Pomona outlines specific procedures for conducting a Level of Service (LOS) analysis, primarily focusing on assessing traffic impacts, intersections, and access for new projects that do not fall under the California Environmental Quality Act (CEQA) review. Here are the main points covered in the guidelines:
Level of Service (LOS) Analysis Procedure
- Preparation by Qualified Engineer: Traffic studies must be directed by a registered traffic engineer in California.
- Study Scope Approval: A "Traffic Study Scoping Form" must be approved by the City before starting the traffic study.
Need for a Traffic Study
- A Traffic Impact Study (TIS) is required if the project generates 50+ trips during any peak hour, is within 300 feet of certain intersections, is controversial, or at the discretion of the City Traffic Engineer.
- If a project generates 1-49 trips, a focused traffic study is required.
Study Area Boundaries
- The study area must include intersections of "collector" or higher classification streets impacted by 50+ peak hour trips from the project.
- Required study elements include site access driveways, adjacent roadways, pedestrian and bicycle circulation, transit access, and consistency with City policies.
Traffic Counts
- Counts must be no more than two years old, taken during peak hours, and include ADT, vehicle classifications, and pedestrian/bicycle counts when applicable.
- Counts should avoid holidays and summer, and should be done on Tuesdays through Thursdays.
Trip Generation and Assignment
- Use the latest ITE Trip Generation Manual, or other approved rates.
- Trip distribution should be based on demographic and market data, and should be detailed in the scoping form.
Traffic Forecasts
- Projects generating fewer than 200 peak hour trips use a 2% annual growth factor. Larger projects must include background traffic and nearby cumulative projects.
Analysis Methodologies
- Intersection Analysis: Follow the Highway Capacity Manual (HCM) methodology for signalized and unsignalized intersections. Additional simulations may be required for closely spaced intersections.
- Traffic Signal Warrants: Use California MUTCD standards, with warrant analyses included in the appendices.
- Roadway Link Analysis: Required for roadways not built to ultimate width or not classified as "collector" or higher.
Analysis Scenarios
Scenarios must include:
- Existing conditions
- Opening year conditions (ambient growth plus approved developments)
- Opening year plus project traffic
Transportation Effects and Mitigation
- The acceptable LOS is D or better. Projects causing degradation from D to E or F must provide improvements to maintain LOS D.
- Unsignalized Intersections: Improvements are required if the project adds traffic that meets peak-hour signal warrants and degrades LOS.
On-Site Parking and Circulation
- A parking analysis must compare the proposed parking supply with City code requirements. Shared parking analysis is considered where appropriate.
- Access and Circulation: Sight distance, driveway length, corner clearance, pedestrian facilities, and bicycle access must be evaluated.
Improvements and Recommendations
- Mitigation measures, improvements, or operational adjustments may be required to address deficiencies in LOS, parking, access, or circulation.
These detailed guidelines aim to ensure that transportation impacts of new developments in Pomona are thoroughly assessed and mitigated to maintain acceptable traffic flow and safety
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