CLEVER measures only wide and has a maximum speed of approximately . It runs on compressed natural gas, achieving a predicted per gallon fuel efficiency. Construction of the first of five prototype vehicles was completed on Friday, April 21, 2006. Shortly after construction, track testing of a prototype vehicle revealed that, in certain transient situations, the DTC system could not guarantee stability of the vehicle. , research into alternative tilt control strategies for the CLEVER vehicle is still on-going at the University of Bath.