Interchange Reconstruction and Flyover Ramps
Four flyover ramps and a rebuilt interchange, built over live traffic with every girder set in a planned overnight closure.
- Owner
- Confidential
- Location
- U.S.
- Market
- Highways & Roads
- Delivery
- Design-build
- Scale
- 4 flyover ramps
- Completed
- 2024
Four new flyover ramps and a rebuilt interchange carrying traffic every day of construction, with every girder set in a planned overnight closure.
The interchange carried a major commuter flow and could not close. Four new flyover ramps had to climb over existing lanes, with tall columns placed in narrow medians and steel girders spanning live traffic. Utilities ran through the work zone, the drainage system was undersized, and the agency set strict limits on daytime lane closures and on noise near homes.
The approach.
- 01
Traffic phasing as the plan
We built the schedule around traffic phases first, so each stage of work had a safe, approved lane configuration.
- 02
Girders set at night
Each girder line was set in a planned overnight closure with two cranes, and the road reopened before the morning commute.
- 03
Utilities moved early
Utility relocations were designed and finished ahead of the bridge work, so no column waited on a conflict.
- 04
Drainage rebuilt underneath
New storm sewers and detention were built in phases beneath the interchange, curing a flooding problem that used to close the ramps.
The outcome.
“Every night we owed the city a road by five in the morning. Sixty-two nights, we paid it back on time.”
Night superintendent, PerryWester
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