at 8:20am, two trains collided at Joo Koon MRT station, injuring 36 passengers and 2 SMRT staff. Safety A number of emergency facilities are available in MRT stations, such as emergency stop plungers to stop trains approaching or at the station, and emergency telephones. Emergency communication buttons in trains allow communication with MRT staff, and emergency detrainment ramps at both ends of the trains allow for evacuation to the track or tunnel. Closed Circuit Televisions (CCTV) are installed in all MRT stations and onboard trains. Several incidents have prompted a response from authorities to enhance safety features. For instance, an accident involving a student at Ang Mo Kio MRT station prompted earlier installation of half-height platform screen doors at that station, although full installation was delayed until December. Gap fillers are installed on all underground MRT stations and trains on the Downtown line. Following a number of incidents where passenger were trapped in the gap created between the platform gates and the train, they have also been installed on new trains on the Circle and North East lines. Platform screen door designs on the North South and East West lines' older stations, however, prohibit the installation of such gap fillers. All stations are built to be as straight as possible to minimise the gap between the platform and the train. Escalator safety is a general concern in Singapore, with almost one accident occurring every day. Escalators at MRT stations usually operate at 0.75m per second, in order to move crowds at a faster rate. Refurbishments are ongoing for those on the North South and East West lines to allow escalators to run at dual speeds of 0.5m during non-peak hours and 0.75m during peak hours. Escalators on the Thomson–East Coast line are designed to operate in this manner. The scheme is expected to be gradually expanded to the Circle, North East, and Downtown lines. Slowing the speeds of escalators is meant to improve the safety of the elderly and young children. Additional features of the refurbished escalators include indicator lights to show the direction the escalator is moving, skirt deflectors to move people away from standing too close to the edges of the escalator, and a system to prevent escalator operation if the handrail speed is not synchronised with the speed of the escalator steps. Fire safety After the Daegu subway fire incident in South Korea, fire prevention became an