Abstract: Apparatus and method for use on a measurement vehicle to measure road surface profiles while correcting for surface slope (cross slope and/or grade). Transducers are mounted on the vehicle suspended mass for measuring distance to the road surface and acceleration normal to the road surface as the vehicle is propelled over the road surface. A third transducer is responsive to fixed increments of vehicle travel over the road surface. Surface profile is determined in the spatial domain over each successive incremental distance. Total acceleration of the vehicle in the direction of the slope is measured, from which acceleration due to vehicle motion is subtracted. Elevation is determined as a trigonometric function of slope, and corrections are implemented to the profile signals.

Abstract: A method of resurfacing a road or the like wherein existing surface profile is first measured as a function of distance over the road surface. A desired profile is then identified as a function of measured road profile by simulating travel of a vehicle over the road surface and observing the quality of vehicle ride and/or pavement dynamic load while the spatial wavelength characteristics of measured profile are progressively attenuated. When ride quality and/or dynamic load of desired preselected standard is obtained, a resurface control signal is obtained as a conjoint function of distance along the road surface and the difference between measured profile and spatially attenuated profile. Road resurfacing equipment is also disclosed for selective removal of pavement surface material or selective deposition of paving material as a function of the control signal so obtained to achieve the desired resurfaced road profile.

Abstract: Apparatus and method for use on a measurement vehicle to measure road surface profile independently of variations in vehicle velocity over the road surface. Transducers are mounted on the vehicle suspended mass for measuring distance (W-Y) to the road surface and acceleration Y normal to the road surface as the vehicle is propelled over the road surface. A third transducer is responsive to fixed increments ds of vehicle travel over the road surface. Surface profile is determined as a continuous function of the time-independent equationW=(W-Y)+.intg..intg.(Y/V.sup.2) ds ds,ps where V is average vehicle velocity over each successive incremental distance ds. A spatial domain filter attenuates profile wavelength components in excess of a desired preselected maximum wavelength.