Roads without Hills Author:Charles MacKinnon The mistake of modern city layout is that no thought was given to an efficient road system. Our roads are an inheritance from the past when travel was limited. Self-propelled or by horsepower and the main reason for roads was to give access to private property. The up & down motion, the fight with gravity, ... more »when we wish to move horizontally, is what wastes energy. Horizontal movement is free - see Newton's laws of motion.« less