junctions The installation of junctions into a rail system poses many challenges, including increased maintenance costs, and problems in on-time performance. Metro rail systems have a rail network design where the number of junctions is minimized. Passengers, and not trains, move from one train station to another. Gallery See also Diamond crossing Double junction Interlocking Junction (traffic) Level junction References External links Train-related introductions in 1831 1831 in rail transport 1831 establishments in England Railway track layouts Permanent way