Norfolk Southern’s Heartland Corridor is one of the most important freight routes in the eastern United States, linking the Port of Virginia with major Midwest markets and Chicago via Columbus, Ohio. To support increasing double-stack container traffic, the railroad advanced a $190 million clearance improvement program through a public–private partnership. The effort removed clearance obstructions at 28 tunnels and seven bridges, enabling more efficient rail operations. These improvements reduced mid-Atlantic to Midwest travel by 250 miles, saving roughly one day of shipping time and improving service reliability across the corridor.
What challenges did STV address?
The project required major modifications to existing tunnels and bridges across challenging terrain in multiple states. Increasing vertical and horizontal clearances while keeping the corridor operational demanded careful planning, field coordination and engineering expertise. Maintaining freight movement through active rail territory added complexity to every phase of construction.
What solutions did STV deliver?
STV provided construction management along with civil and structural engineering and rail design and inspection services. The team oversaw the modification of 5.7 miles of tunnels and three overhead bridges, ensuring work progressed safely and efficiently. STV’s multidisciplinary expertise helped the client navigate technical and logistical constraints while meeting strict clearance standards.
How does this project benefit the region?
By enabling double-stack service across the entire route, the improvements significantly increase freight capacity and reduce delivery times. These gains strengthen supply chains, support economic growth and enhance the competitiveness of one of the country’s busiest freight corridors.
Key stats and accolades
- $190 million clearance improvement program
- Clearance upgrades at 28 tunnels and seven bridges
- 250‑mile route reduction enables one‑day travel time savings
- STV oversaw modifications to 5.7 miles of tunnels and three bridges
