Strategic infrastructure improvements completed during a single planned work window strengthen reliability across a key freight corridor in Indiana and Kentucky.
During a recent 26-hour maintenance window on Norfolk Southern's W Line, which supports intermodal and automotive traffic between Midwest and Southeast markets, railroaders completed six major infrastructure projects across southern Indiana and Kentucky. The coordinated effort included bridge replacements, track and ballast renewal, upgrades to a complex rail junction, and preparation for a future automated railcar inspection portal.
Top Takeaways
- Norfolk Southern teams from Engineering and Transportation completed six major infrastructure projects during a single planned work window on the W Line in Indiana and Kentucky.
- Cross-functional planning and execution improved infrastructure reliability while avoiding five additional maintenance windows.
- The work strengthened bridges, renewed track, and increased operating speeds, supporting long-term network performance.
Why it matters
Every planned maintenance project requires balancing infrastructure needs with customer service and network performance.
According to David Taylor, Division Engineer, bundling multiple projects into a single work window enabled NS to complete significant infrastructure work while avoiding five additional maintenance windows that would have affected operations and customers. The effort also provided an opportunity to complete additional maintenance activities including rail replacement, welding, ditching, and grinding.
"Success started long before the work began," said Taylor. "Our teams brought together ideas from across the railroad, assigned strong project leaders and worked through challenges early to ensure safe, efficient execution."
Major improvements across the corridor
Work completed during the 26-hour work period included:
- Three bridge replacements in Indiana and Kentucky
- Track and ballast renewal through the English Tunnel in Indiana
- New track installation in Bretzville, Indiana, supporting an automated railcar inspection portal planned for 2027
- Upgrades to a complex rail junction supporting train movements at Portland Avenue in Louisville, Kentucky
By bundling multiple projects into a single phased approach, teams maximized available track time and delivered more value from planned infrastructure work.
One of the most technically complex projects involved replacing the Portland Avenue diamond crossover and four power switches. The unique track configuration supports multiple yard, mainline, and branch-line movements, making precision planning and installation critical.
The bridge replacement in Shelbyville, Kentucky, included track realignment through a challenging curve, creating a smoother route that eliminated a longstanding maintenance issue and increased train speed from 30 to 35 mph. The new alignment is capable of supporting 40 mph in the future.
