Los Angeles County Traffic Study Guidelines Section 4.3.4. - Recommended Action
If the analysis indicates that the project may lead to significant traffic diversion, the project applicant must engage in public outreach and develop a Local Residential Street Cut-Through (LRSTM) Plan. Collaboration with Public Works, neighborhood stakeholders, and other relevant parties is required to prepare the LRSTM Plan. Coordination with the appropriate Supervisorial District office may be necessary to identify stakeholders facilitating public outreach.
The project applicant must submit a separate scoping document for the LRSTM Plan to Public Works as part of the Transportation Impact Analysis. This document should include:
- Identification of key milestones,
- Summary of the proposed LRSTM Plan development process for concerned local residential street segments,
- Definition of a public outreach and consensus-building strategy,
- Proposal of criteria for evaluating and approving traffic calming measures,
- Funding plan outlining potential funding sources.
Prior to the issuance of a building permit, the project applicant must submit the LRSTM Plan, along with cost estimates for improvements and a funding plan, to Public Works for review and approval. The LRSTM Plan must adhere to Public Works guidelines and should encompass, at minimum, the following components:
- Description of existing facilities and local traffic conditions,
- Proposed neighborhood traffic control measures, including sketches of specific street modifications,
- Analysis of anticipated changes in current and future traffic patterns resulting from plan implementation,
- Implementation and monitoring program.
The project applicant, in collaboration with Public Works and the affected Supervisorial District office, will lead the public outreach efforts.
Development of the LRSTM Plan should include an analysis of relevant traffic data, roadway characteristics, and conditions of local residential street segments under consideration.
The LRSTM Plan should prioritize effective traffic calming measures in accordance with Public Works guidelines and applicable warrants, which may include:
- Traffic circles,
- Speed humps,
- Roadway narrowing features (raised medians, traffic chokers, etc.),
- Landscaping enhancements,
- Modifications to roadway striping,
- Installation of traffic control devices,
- Restrictive measures such as turn restrictions, physical barriers, diverters, and signal metering, among others.
Evaluation of restrictive measures should ensure they do not result in significant traffic diversion from one local residential street to another.
Additionally, the project applicant is responsible for conducting engineering evaluations to assess the feasibility of proposed measures regarding drainage, constructability, street design, and other pertinent factors.
Our services are available throughout Los Angeles County, including 90080, 90081, and 90082.