A planned speed increase for trains in Maine, from 25 mph to as fast as 40 mph, is raising questions about safety in towns along the tracks.

CSX Transportation has upgraded 481 miles of track across the state, allowing its freight trains to travel at speeds of up to 40 miles per hour, compared to the previous speed of 10 miles per hour.

As the company experiences financial troubles, the Maine Department of Education hopes to get relief for school districts.

Experts say the vehicles are easier to maintain, and better for the environment and student health, officials say.