(Electric-HIGHWAY) An electrically-augmented road. In 2012, Siemens began trials in Germany that work like trolley cars. Hybrid diesel-electric trucks are fitted with rods that are raised when entering the roads with overhead electric lines at speeds up to 60 mph. To reduce smog in California, pilot projects of the Siemens system are expected at the ports of Los Angeles and Long Beach in the future. See autonomous vehicle.