Abstract: A mobile platform, sensors mounted on the mobile platform, computers, data storage devices, power system, data acquisition hardware, and software form a Travel Way Measurement System. The mobile platform with sensors mounted within and upon it, moves along a surface travel way and records data to determine an accurate location and geometry of the travel way surface, surface features, transverse profile and features along side the travel way surface, structures, signs, and other features above the travel way surface, and utilities, pavement thickness and properties, pavement condition, and bridge deck properties and condition below the travel way surface. The mobile platform and sensors can travel and collect data at up to 60 miles per hour or more. The data acquisition hardware and software protocols permit the synchronization of all the sensor outputs in the temporal and spatial domain or in any other domain resulting from numerical transformation of sensor outputs.

Abstract: Pavement cross-slope is measured at highway speeds by mounting a ring-laser gyroscope on a vehicle and measuring deviation of the transverse slope of the vehicle. Precise laser distance measuring devices are mounted transversely with respect to the vehicle at significantly distant points to measure vehicle roll by measuring displacement of the laser distance measuring units from the pavement. The difference between at rest measurements of the laser distance measuring devices, the dynamic measurements produced by those devices and the relation of the dynamic measurement to the distance between the measurements provides the exact value of vehicle roll with respect to the pavement. That exact value of vehicle roll is compared with the ring gyro angular measurement to produce a precise measurement of pavement slope. A positional device is mounted on the vehicle for determining the position of the vehicle on the roadway.

Abstract: Pavement cross-slope is measured at highway speeds by mounting a ring-laser gyroscope on a vehicle and measuring deviation of the transverse slope of the vehicle. Precise laser distance measuring devices are mounted transversely with respect to the vehicle at significantly distant points to measure vehicle roll by measuring displacement of the laser distance measuring units from the pavement. The difference between at rest measurements of the laser distance measuring devices, the dynamic measurements produced by those devices and the relation of the dynamic measurement to the distance between the measurements provides the exact value of vehicle roll with respect to the pavement. That exact value of vehicle roll is compared with the ring gyro angular measurement to produce a precise measurement of pavement slope. A positional device is mounted on the vehicle for determining the position of the vehicle on the roadway.