The Alstom Metropolis C751C is the second generation of communication-based train control (CBTC) electric multiple unit rolling stock in operation on the North East line of Singapore's Mass Rapid Transit (MRT) system.

[8][9] Externally, the C751C shares similarities with its predecessor, the C751A in terms of shape, color and appearance, but has an additional window on the detrainment doors located at the ends of the train, allowing passengers to see the tracks ahead.

The C751C is fully driverless under normal circumstances, using CBTC which do not require traditional "fixed-block track circuits" for determining train position.

Recent studies consistently show that CBTC systems reduce life-cycle costs for the overall rail property and enhance operational flexibility and control.

A complete six-car trainset consists of an identical twin set of one driving trailer (DT) and two motor cars (Mi & Mp) permanently coupled together.