Abstract: A landscape edging member for use in defining borders of walks, patios, driveways and the like, is provided with edge lips on one side of a base wall, which serve as stops when one of the landscape edging members is inverted and nested with another landscape edging member, to prevent lateral shifting of the nested landscape edging members when they are placed in a stack or bundle. The lips of the nested landscape edging members overlap portions of the vertical walls of the other one of the two nested landscape edging members, which form an inverted pair of landscape edging members. The lips are high enough from the base wall to prevent lateral shifting of the nested pair when a stack of the landscape edging members are shipped.

Abstract: Apparatus and method for measuring height variations along a directional axis in a roadway surface from a vehicle includes a first sensor for sensing a first distance from the first sensor to a first point on the surface and generating a first signal indicative of the first distance; a second sensor for sensing a second distance from the second sensor to a second point axially separated from the first point on the surface and generating a second signal indicative of the second distance; and a computer for receiving the first and second signals and generating and recording a difference signal indicative of the difference in height of the first and second points, The first and second sensors are operated simultaneously to compensate for vertical motion of the sensors with respect to the surface.