Interstate Interchange Reconstruction
A worn cloverleaf replaced by a modern system interchange, with every lane open at rush hour.
- Owner
- Confidential
- Location
- U.S.
- Market
- Highways & Roads
- Delivery
- Design-build
- Scale
- 7 ramps
- Completed
- 2024
A cloverleaf interchange rebuilt as a modern system interchange, with every lane kept open at rush hour.
Seven ramps carried commuter and freight traffic in loops that forced weaving and backups. Replacing them meant building new flyovers over live lanes and shifting traffic onto temporary alignments again and again. Lane closures were allowed only overnight, and the penalty for a late reopening was steep.
The approach.
- 01
Traffic stages before structure
Every temporary alignment was modeled and sequenced first, so construction followed the traffic plan instead of fighting it.
- 02
Design packages released early
Foundations and early ramps went to construction while the flyover was still in design, keeping crews productive from the start.
- 03
Beams set in overnight windows
Girder erection was scripted pick by pick, with crane positions and lane closures rehearsed before each night.
- 04
Hourly tracking at night
Closure crews reported progress against the window every hour, so a slipping night was caught before it became a late morning.
The outcome.
“Every closure was a promise to the morning commute. We kept score by the hour, not by the week.”
Project manager, GilbertLanham
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