A simple catenary with copper-steel contact wire is one of overhead contact lines equipped high-speed lines as Shinkansen. Local wear of the contact wires were visible at the simple catenary with copper-steel contact wire of commercial lines. In addition, the result of the investigation on this line revealed that the wear occurred at overlaps of the overhead contact line and a part of station. The authors therefore proposed a measure for local wear at the overlaps, and verified the effects on a commercial line. Furthermore, we clarified the cause of wear by monitoring the sliding surfaces of the contact wires at the stations.