However, because the line is a single track and no passing facilities are installed at Kosei Station and other stations, it is difficult to increase the number of trains by more than two an hour (including rush hours) in order to enhance the convenience; therefore, the local governments and residents are requesting that JR West use double-tracking and increase the number of trains.
とはいえ単線であり、また甲西駅等に行き違い設備がないことから、ラッシュ時も含め1時間に3本以上の列車本数の増加は難しく、利便性向上は望めないため自治体・住民からはJR西日本に対して複線化・増発要望が出ている。