Case Studies

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

The three bridges over the Firth of Forth (from left to right); the Forth Bridge, the Forth Road Bridge, and the Queensferry Crossing.
The three bridges over the Firth of Forth (from left to right); the Forth Bridge, the Forth Road Bridge, and the Queensferry Crossing.
Smart arrow boards include GPS units, enabling DOTs to send real-time information to drivers.
Smart arrow boards include GPS units, enabling DOTs to send real-time information to drivers.
Shallow plane failures on a steep roadway slope threatened I-80 and an access road for a Caltrans maintenance station.
Shallow plane failures on a steep roadway slope threatened I-80 and an access road for a Caltrans maintenance station.
The Longbird Bridge looking northeast. Photo by Akil Simmons.
The Longbird Bridge looking northeast. Photo by Akil Simmons.
teton pass
CrashGard sand barrels act as a crash cushion along the Teton Pass in Wyoming.
sign shop
WSDOT manufactures about 60 percent of its signs in-house at its Union Gap, WA-based sign shop.
The western bridge span.
The western bridge span. All photos courtesy of The Reinforced Earth Company.
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.
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.
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