Los Angeles County Traffic Study Guidelines Section 4.3.4. - Recommended Action

If the analysis indicated the project may result in substantial diversion, the project applicant shall conduct public outreach and develop a Local Residential Street Cut- Through (LRSTM) Plan. The project applicant shall consult with Public Works, and neighborhood stakeholders, and any other stakeholders to collaboratively prepare the LRSTM Plan. Coordination with the appropriate Supervisorial District office may be necessary to designate the stakeholders that should facilitate the public outreach.

The project applicant shall submit a separate scoping document for the LRSTM Plan to Public Works for review and approval as part of the Transportation Impact Analysis which shall include the following items:

• Identify key milestones,
• Summarize the proposed process in developing a LRSTM plan for the local residential street segments of concern,
• Define a public outreach and consensus- building process,
• Propose selection and approval criteria for any evaluated traffic calming measures,
• Provide a funding plan which will include potential sources of funding.

The project applicant shall submit the LRSTM Plan with a cost estimate for the improvements, and a funding plan to Public Works for review and approval, prior to issuance of building permit. The LRSTM Plan shall be prepared in conformance with the guidelines established by Public Works and should contain, at a minimum, the following elements:

• Description of existing facilities and neighborhood traffic conditions,
• Description of proposed neighborhood traffic controls, including sketches of specific street modifications,
• Analysis of any change in existing or future traffic patterns as a result of implementation of the plan,
• Implementation and monitoring program.

The project applicant shall lead public outreach in consultation with Public Works and the affected Supervisorial District office.

The development of the LRSTM plan shall include the analysis of any relevant traffic data, roadway characteristics, and conditions of the local residential street segments of concern.

The LRSTM Plan should prioritize implementing effective traffic calming subject to Public Works guidelines and appropriate warrants, which may include, but is not limited to:

• Traffic circles,
• Speed humps,
• Roadway narrowing effects (raised medians, traffic chokers, etc.),
• Landscaping features,
• Roadway striping changes,
• Traffic control devices,
• Restrictive measures such as turn restrictions, physical barriers, diverters, signal metering, etc.,
  • Restrictive measures should be carefully evaluated to ensure that they do not lead to the diversion of a significant amount of traffic from one local residential street to another local residential street.

For these above-mentioned items, the project applicant shall also be responsible for conducting the engineering evaluation of the potential measures to determine the feasibility regarding drainage, constructability, street design and other pertinent elements.

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