The Vision Zero Action Plan states that we will review the efficacy of transportation safety mitigation measures by assessing conditions before and after implementation, which will inform future policies and implementation of such mitigation measures. This page summarizes the findings and next steps for before / after studies conducted on safety improvements, such as:
View the sections below to learn more about past or ongoing before/after analysis for each of these categories.
Whenever we install a pilot safety project, we identify performance metrics so we can study whether the project is successfully addressing safety concerns through either quantitative or qualitative measures. See below for examples of before/after performance tracking for completed Vision Zero safety pilot projects. For more information about each project, please visit the Safety Pilot Projects page.