The Tennessee Department of Transportation (TDOT) set out to replace the aging 1948 Broadway Avenue Viaduct in downtown Nashville – a 700-foot-long, 98-foot-wide bridge spanning five active freight tracks beneath. With the structure nearing the end of its service life, the goal was to deliver a modern bridge that enhances safety and mobility for the public while maintaining uninterrupted freight service and protecting critical utilities that power much of the city’s downtown core.
What challenges did STV address?
Replacing a heavily used urban bridge over active freight rail required complex coordination between TDOT, CSX, utilities, and contractors. The project demanded an accelerated bridge construction (ABC) approach to minimize disruption while ensuring the safe transfer of vital communications and power infrastructure. Working in the heart of Nashville’s transportation network also meant accommodating heavy commuter and pedestrian traffic while maintaining rail operations below.
What solutions did STV deliver?
STV served as a key liaison between TDOT and CSX, overseeing design review, construction coordination, and phasing to protect railroad operations. The firm helped coordinate the implementation of ABC methods that allowed the old 13-span bridge to be replaced with a more efficient five-span structure within an eight-week closure. STV also managed the safe relocation of eight major fiber-optic cables and verified improved vertical and horizontal clearances for both public and freight operations.
How does this project benefit Nashville and freight mobility?
The new Broadway Viaduct enhances safety and accessibility for drivers and pedestrians while ensuring the reliable movement of freight through downtown Nashville. The modern structure not only improves traffic flow but also strengthens connections between neighborhoods divided by the rail corridor. The project serves as a model of collaboration between state agencies and private railroads, demonstrating how infrastructure renewal can advance shared mobility and economic goals.
Key Stats and Accolades
- Replacement of 1948 Broadway Viaduct spanning five active CSX tracks
- Delivered through accelerated bridge construction within eight weeks
- STV served as liaison between TDOT, CSX, and multiple utility stakeholders
- New bridge features improved vertical and horizontal clearances
