Office of Operations
photos of traffic merging onto congested highway, congestion in snowstorm, variable message sign, cargo, variable speed limit sign in a work zone, and a freeway at night
21st century operations using 21st century technologies

Bookmark Update

The Signal Timing Manual has changed to:

https://nap.nationalacademies.org/catalog/22097/signal-timing-manual-second-edition

If you are not automatically forwarded there within 15 seconds, please select the link above and update your bookmark.

Thank you!