The Speed Limit Setting and Signing Project aims to help reduce speed-related crashes as part of Vision Zero, the Boulder community’s goal to end severe crashes.

Completion Date
2024

Project Overview

The Speed Limit Setting and Signing Project (SLSSP) will develop a consistent framework for establishing and communicating speed limits citywide. The project aims to help reduce speed-related crashes as part of Vision Zero, Boulder’s goal to end severe crashes.

Speeding has been identified by Boulder community members as one of the top traffic safety concerns on city streets, with speeding being an over-represented factor contributing to serious injury and fatal crashes. The project began directly from the recommendations, goals and objectives of the Transportation Master Plan and the Vision Zero Action Plan, a plan with prioritized actions the city will take to end serious injury and fatal crashes on our streets.

The project will study speed limits and signing primarily on arterial and collector roads, which are key roads that connect the city and often have higher speed limits. This study does not include local residential streets as these streets have a 20 mph speed limit as part of a city effort completed in 2020.

Goals

The project will improve the consistency and methodology behind citywide speed limit setting and signing by:

  • Developing a quantitative citywide approach and practice for speed limit implementation methodology
  • Creating a methodology document and sharing with the community and stakeholders

Project Elements

To support these goals, there are five elements to this project:

  1. Community engagement
  2. Peer agency and best practice review
  3. Speed limit setting and signing methodology
  4. Speed limit setting and signing public facing document
  5. Speed limit recommendations

Community Engagement

For events and project updates, check back on this webpage or sign up for the monthly Transportation and Mobility Newsletter.

The project team has interviewed peer agencies about their speed limit setting methodologies and conducted an extensive review of national best practices and tools related to speed limit setting. Using this information, the team identified factors frequently considered in speed limit setting.

In partnership with a community stakeholder working group, Boulder staff reviewed and prioritized factors to be included in the methodology considering the City of Boulder's values. The team is using that information to develop a flowchart that establishes the methodology's logic and key decision points. Supplemental traffic data is being collected. The methodology will be tested and refined through an iterative process that continues to consider the context and values of the City of Boulder.

January 2024 Update

The team is currently focused on establishing an initial speed limit setting methodology framework. A draft methodology is expected to be published in March 2024.

Timeline

The timeline for this project is six to eight months.

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A visual version of the timeline.

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Community engagement

  • Summer 2023 to spring 2024. Transportation Advisory Board meetings are scheduled for summer 2023 and spring 2024. Stakeholder meetings are scheduled for summer 2023 to winter 2024.

Peer Review

  • Summer to fall 2023.

Methodology

  • Fall 2023 to spring 2024.

Implementation

  • Starting summer 2024.