What is three-track operation?
There are four tracks serving the Fullerton and Belmont stations on which the Brown Line, Red Line and Purple Express operate. Two of the tracks are for northbound service, two are for southbound service. One of the four tracks along the platforms at each station must be taken out of service while the platform is rebuilt and tracks are reconfigured to allow room for elevators to be installed. The specific track to be taken out of service will vary during the course of the project.
