Denver Airport Has a Radical Fix for Overcrowded Trains: Make Passengers Walk

Key Takeaways

• Denver will repurpose baggage tunnels into walkways starting 2027.
• Walkways connect Concourses A‑B and B‑C, easing train crowding.
• $75 million train upgrades still face reliability and capacity issues.
• Pedestrian tunnels offer a low‑cost backup and health‑focused option.
• Airline leaders praise added connectivity for United and Southwest passengers.

Pulse Analysis

Denver International Airport (DEN) has long relied on an automated people mover to shuttle passengers between its three main concourses. In recent years the system has struggled with capacity constraints and frequent service interruptions, prompting complaints from travelers and airlines alike. Although the airport has poured more than $75 million into newer train cars and control‑system upgrades, ridership continues to outpace supply during peak periods. Faced with mounting pressure, DEN’s planners turned to an unconventional fix: reusing the dormant baggage‑handling tunnels that run beneath the airfield as pedestrian corridors.

Converting the A‑B and B‑C tunnel segments into walkways offers several strategic advantages. Construction can begin without major excavation, keeping costs well below those of a new underground rail line, and the project is slated for completion by 2027. Travelers gain a health‑focused option to stretch their legs, while airlines acquire a reliable fallback if the train experiences outages. Both United and Southwest executives have publicly welcomed the plan, citing improved connectivity for connecting passengers and reduced dwell times as key operational benefits.

The DEN initiative could inspire other congested hubs to explore similar low‑cost retrofits, especially where legacy baggage tunnels sit idle. By repurposing existing infrastructure, airports can enhance passenger flow without the lengthy timelines and capital outlays typical of new rail projects. Moreover, the walkways open opportunities for retail kiosks or wayfinding signage, generating ancillary revenue while improving the traveler experience. As airlines and passengers increasingly value flexibility and health‑conscious amenities, pedestrian tunnels may become a standard complement to automated people movers in future airport designs.