This interactive timeline (beta version) shows selected deployments of different work zone safety technologies over the last 25+ years. The number in parenthesis to the right of each technology indicates the number of studies included.

This visualization was developed using publicly available evaluation and research studies from the Benefits, Costs, and Lessons Learned Databases.

Tips for Using the Visualization: You can use your scroll to zoom in or out of the timeline. Click the filters for "Urban / Rural" and "Long-Term / Short-Term." Click and hold anywhere on the timeline to move your view left or right. Hover your mouse over the points to learn more information and find links to the source documents.