Three Lines : Western , Central and Harbour
Western : Starts from Churchgate ,follows the city’s west coast about 124 kilometers north to Dahanu Road (towards Ahmedabad).
Central & Harbour : The Central and Harbour lines start from Chhatrapathi Shivaji Maharaj Terminus (Formerly know as Victoria Terminus) .
The Central Line runs out towards the northeast of city, through Thane and Kalyan ,it divides into two corridors i.e.to Kasara (towards Nashik) and Khopoli (towards Pune).
The Harbour line branches off at Wadala Road, and from there its runs towords Goregaon and Panvel .
You can change the route at Dadar , Kurla and Mahim junction as Common station for Western and Central lines is Dadar station, for Harbour and Central lines is Kurla while for Harbour and Western line common station is Mahim .