Trains entering the station must drive past the platform, and then back in. There are also similar level turnoffs where one train can back in to allow another going in the opposite direction to pass. (There is only one set of tracks on this line.) Even non-railroad-buffs are sure to find it interesting.
沿途車站中，合興站是全台僅存的「折返式車站」：該區段因坡度太陡，所以將站內月台鐵道線建成平的，當火車經過幹道線二十五度斜坡，為避免列車交會時煞車不良而下滑，火車進站要先前進再倒退進入站內線，即使非鐵道迷也會覺得十分有趣。