Security on the Mass Rapid Transit (Singapore)
In the Mass Rapid Transit system in Singapore, security issues related to crime and terrorism were not high on the agenda of the system's planners since its inception, but since the occurrence of several high-profile terrorism incidents elsewhere, CCTVs have been upgraded and installed across all stations, and security officers patrol inside the trains and within train stations 24/7. == Enforcement == In the wake of heightened security concerns as a result of the September 11, 2001 attacks, and also particularly the 11 March 2004 Madrid attacks in which the commuter rail system was targeted, the Singapore government initiated several measures aimed at securing the rail system from a similar attack.
Source: Wikipedia — Security on the Mass Rapid Transit (Singapore) (CC BY-SA 4.0)