Apr 27, 2018 | Articles, News, Resources
Learn What’s New in IA-21 vs. IA-11 On March 20, 2018, the Federal Highway Administration issued Interim Approval 21 – Rectangular Rapid-Flashing Beacons at Crosswalks in the Manual on Uniform Traffic Control Devices (MUTCD). The Basics IA-11 is no longer valid:...