Between the road bed and the corbels on the bridge abutment. The slab enables direct transmission between the road bed and the traffic load. However, the filler at the connection between the two will be lost due to long-term water seepage. It is located between the road bed pillows or road subgrade, and the corbels on the back of the bridge abutment. Lapping refers to the measures taken to prevent settlement of the bridge end connection, resting between the abutment or the end of the cantilever beam plate and the fill.