Patent ID: 7845878

Claim:
An apparatus, comprising: a bridge rig for spanning a road surface, the bridge rig having a first wheel and a second wheel; a plurality of non-contact elevation distance sensors supported by the bridge rig for measuring distances to the road surface at a plurality of locations along the road surface; a slope sensor supported by the bridge rig for measuring an angle of incidence of the plurality of non-contact elevation distance sensors relative to a horizontal plane; a height adjustment assembly coupled with the bridge rig, the height adjustment assembly configured for adjusting a height of the bridge rig above the road surface and for adjusting a height of the plurality of non-contact elevation distance sensors above the road surface, the height adjustment assembly responsive to an input to adjust the height of the plurality of non-contact elevation distance sensors above the road surface; a first travel distance sensor connected to the first wheel of the bridge rig for measuring a first travel distance for the first wheel of the bridge rig; and a second travel distance sensor connected to the second wheel of the bridge rig for measuring a second travel distance for the second wheel of the bridge rig, wherein the distances measured by the plurality of non-contact elevation distance sensors and the angle of incidence measured by the slope sensor are utilized to generate an elevation profile of the road surface for the plurality of locations along the road surface, and the plurality of locations along the road surface measured by each of the plurality of non-contact elevation distance sensors are determined at least in part by calculating a weighted average utilizing the first travel distance and the second travel distance.