The Colombo Suburban Railway Project is comprises of four main components. The following list porivides the basic introduction to each main component.
Kelani Valley Line Development - Maradana to Avissawella
The Kelani Valley line extending from Maradana to Avissawella is 60 km with daily passenger volume of 14,600.
Main Line Development - Maradana to Rambukkana
Rambukkana is 83 km away from Maradana and is the end station of the double line section in the 291 km long Main Line.
Coastal Line Development - Colombo Fort to Kalutara South
Coastal Line of the Sri Lanka Railway is 159 km long and Kaluthara South is 43.0 km away from Maradana.
Puttalam Line Development - Ragama to Negombo
Puttalam Line deviates from Main Line at Ragama runs upto Puttlam and the line length is 133 km from Maradana with double-track upto Katunayake and single track beyond.