The orange dot in the upper left of this picture indicates almost a 3/4″ height difference between the two concrete sidewalk slabs. While this trip hazard tapers down to less on the right hand side of this picture, there’s a good 4′ feet of safety issue in this example, which is right outside a set of steps to the front entrance of two units in the complex. Typically, this problem will only get worse each season as the lower slab collects and traps water in the gap between (and underneath) the two slabs. The freeze and thaw of one winter cycle is enough to move and crack concrete sidewalk slabs!
