Section 3.1.2. - Screening Criteria

Los Angeles County Traffic Impact Study Guideline section Section 3.1.2.1. - Non-Retail Project Trip Generation Screening Criteria

If the answer is no to the question below, further analysis is not required, and a less-than-significant determination can be made.

• Does the development project generate a net increase of 110 or more daily vehicle trips?

A project’s daily vehicle trip generation should be estimated using the most recent edition of the Institute of Transportation Engineers (ITE) Trip Generation Manual. If the project's proposed land use is not listed in the ITE Trip Generation Manual, please submit a trip generation study to Public Works for review and approval.

Los Angeles County Traffic Impact Study Guideline section 3.1.2.2. - Retail Project Site Plan Screening Criteria

A project that contains a local serving retail use is assumed to have less than significant VMT impacts for the retail portion of the project. If the answer to the following question is no, a less than significant determination can be made for the portion of the project that contains retail uses.

• Does the project contain retail uses that exceed 50,000 square feet of gross floor area?

However, if the retail project is part of a mixed-use project, then the remaining portion of the project may be subject to further analysis in accordance with other screening criteria in Section 3.1. Projects that include retail uses in excess of the Retail Project Site Plan Screening Criteria need to evaluate the entirety of the project’s VMT.

Los Angeles County Traffic Impact Study GuidelinesSection 3.1.2.3. – Proximity to Transit-Based Screening Criteria

If a project is located near a major transit stop or high-quality transit corridor, the following question should be considered:

• Is the project located within a one-half-mile radius of a major transit stop or an existing stop along a high-quality transit corridor?

If the answer to the question above is yes, then the following subsequent questions should be considered:

• Does the project have a Floor Area Ratio less than 0.75?
• Does the project provide more parking than required by the County Code?
• Is the project inconsistent with the SCAG RTP/SCS?
• Does the project replace residential units set aside for lower-income households with a smaller number of market-rate residential units?

If the answer to all four questions is no, further analysis is not required, and a less-than-significant determination can be made.

To determine the proposed change in residential units, the total number of lower-income housing units that exist on the project site should be counted and compared to the total number of lower-income and market-rate residential units proposed by the project. If there is a net decrease in residential units, the Proximity to Transit Based Screening Criteria cannot be utilized.

Los Angeles County Traffic Impact Study Guidelines Section 3.1.2.4. – Residential Land Use Based Screening Criteria

Independent of the screening criteria for non-retail and retail projects, certain projects that further the State’s affordable housing goals are presumed to have less than a significant impact on VMT. If the project requires a discretionary action and the answer is yes to the question below, further analysis is not required, and a less-than-significant determination can be made.

• Are 100% of the units, excluding manager’s units, set aside for lower-income households?

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