Indian Railways electric locomotive WAP4 22293 with train 12903 "Golden Temple Mail" from Mumbai Central to Amritsar. In front you can see an empty container train; it consists of groups of five cars, internally coupled with fixed low level coupler bars, the automatic CBC (Janney) couplers at the end of each unit require a raised structure as these cars are otherwise built rather low to have space for high cube containers. Sawai Madhopur, 2012-12-18.