power rail on either side. They operate in both single-car and double-car arrangements. Train formation The original system consists of single-car C810s. Each unit is long and can carry up to 105 passengers. 16 original C810s were modified to allow two-car train operation and 16 C810As came with this configuration. This boosted the capacity to 204 passengers per trip. Train control The line is equipped with Kyosan APM fixed block signalling system for Automatic train control (ATC) under Automatic train operation (ATO) GoA 4 (UTO). The subsystems consist of Automatic train protection (ATP) to govern train speed, Automatic Train Supervision (ATS) to track and schedule trains, and a computer-based interlocking (CBI) system that prevents incorrect signal and track points settings. References External links Punggol LRT line Light Rail Transit (Singapore) lines Punggol Crystal Mover people movers Railway lines opened in 2005 Transport in North-East Region, Singapore 2005 establishments in Singapore Automated guideway transit