The 3.3 mile long QLINE light rail line in Detroit debuted on Friday, May 12, with curious riders packing cars all weekend. In response to the demand, the operator has chosen to extend the initial free ride period through this week. The schedule calls for 15-minute headway between cars, but riders have experienced wait times of up to 25 minutes as the operator adjusts to handling the peak demand. Construction on this starter line began in 2013, thanks to a combination of private investment and a $25 million federal grant. Expected daily ridership is projected between 5,000 and 8,000 per day.

—Passenger Train Journal