road building machinery, asphalt paver with level sensors for good road evenness, ultrasonic measuring accuracy

accuracy alignment asphalt asphalting automatic automotive bitumen blacktopping bridge building construction control corrects equalization equates evenness flatting fresh gasket good grade gravel heat height hot industrial industry layer laying level machine machinery measure measured measurement measuring modern multiplex non-contact noncontact pavement paver paving pebble positioning realign road roadwork sensing sensor sensors site slope special spreader spreading tar teamwork ultrasonic value