Midwest train travelers will enjoy a quicker passage, as Amtrak approves a new top speed of 110 mph for a section of its Chicago-St. Louis route. Though trains will only accelerate to the new top speed over a 15-mile segment, officials said another $1.5 billion investment over three years of upgrades will bring the rest of the track up to speed.

The current top speed is 79 mph over most of the route. Instead of 5 and a half hours, future trips could be under 4 hours. Union Pacific Railroad and Amtrak tested a new system of triggers for highway crossing gates earlier this year.

Amtrak’s Midwest presence has seen a significant ridership boost, following trends around the country. Transit in general may be enjoying a small renaissance, with the CTA counting 16 months of rail and bus line increases. Despite setting ridership records, Amtrak is losing money and faces an uncertain future.