Parry People Mover's unusual Class 139 railcar is one answer to economical operation of short branch lines, and has been adopted by London Midland for its ten minute interval service between Stourbridge Town and Stourbridge Junction (0.8 miles). Powered by a 2.3 litre Ford LPG engine, the railcar uses energy stored in a large flywheel for its short trips along the branch. 139002 is seen departing from the diminutive Stourbridge Town station on 29 January 2011 with the 11:54 trip to Stourbridge Junction.