Case Studies

Learn how recent infrastructure projects improved safety, increased efficiencies, trimmed costs and implemented new technologies.

Smart arrow boards include GPS units, enabling DOTs to send real-time information to drivers.

ATSSA explores work zone technology applications

Shallow plane failures on a steep roadway slope threatened I-80 and an access road for a Caltrans maintenance station.

Stabilizing Transportation Infrastructure with Minimal Carbon Impact

The Longbird Bridge looking northeast. Photo by Akil Simmons.

Hot-Dip Galvanized Rebar Serves Bermuda Bridge for 7 Decades

teton pass — CrashGard sand barrels act as a crash cushion along the Teton Pass in Wyoming.

Wyoming’s New Approach to Highway Crash Cushioning

sign shop — WSDOT manufactures about 60 percent of its signs in-house at its Union Gap, WA-based sign shop.

Washington State DOT Finds Success With Digital Sign Printing Specification

The western bridge span. — The western bridge span. All photos courtesy of The Reinforced Earth Company.

Constructing Northern Virginia's first diverging diamond interchange

Built to last in Pella, Iowa, The Thunder Creek MTT920 stands up to every harsh, off-road environment H2Dig throws at it, including over a levy system and through heavy timber.

Thunder Creek Fueling Efficiency in The Big Woods

"It takes five minutes, tops, and we’ve never had one fail."

Why Switch?—Adjustable Risers Prove Themselves in Greensboro NC