Show records road surface A machine called the has been invented which me measures a ures the profile of a road it lo 10 looks 0 tk s ditke like a large scooter moves on 16 small rubber wheels as it accurately records the surface bumps and irregularities lari Iari ties using this machine highway experts can find what interferes eres with the smooth rolling of automobiles to incidentally the device shows that highways are rougher at certain times of the day than others and that roads are sensitive to changes in temperature and moisture in the air |