sentences:  Following the changes to the Locomotive Act and Locomotive on Highways in 1896 the market for Road Locomotives expanded considerably.Charles Burrell & Sons Road Locomotives were slightly modified versions of their general-purpose engines to allow for faster rates of travel over long journeys.A general-purpose engine was designed to spend much of its life stationary, powering belt-driven equipment, whereas a road locomotive was constantly on the move, therefore subtle design differences were needed.