WAP 7 is a high speed locomotive indigenously developed by Chittaranjan Locomotive Works. It is capable of hauling trains at speeds ranging between 140 and 160 km per hour and is now largely used by Northern Railways (NR), South Central Railways (SCR), South Western Railway (SWR) Southern Railways (SR), Eastern Railways (ER), South East Central Railway (SECR), and East Central Railways (ECR)