The Main Line has a gauge of 5 ft 6 in (1,676 mm) broad gauge.

The Main Line is not electrified.
 Regular services run on diesel power.
 However, there are plans to electrify the commuter rail network, within Colombo.
 This includes the Main-line segment between Colombo Fort and Veyangoda.

Most of the line currently operates on a lock-and-block signaling system.
 The commuter rail section was upgraded to electric signalling in the mid-twentieth century.
 The system is connected to a centralised traffic control panel at Maradana Railway Station.
The Main Line has a gauge of 5 ft 6 in (1,676 mm) broad gauge.
The Main Line is not electrified.  Regular services run on diesel power.  However, there are plans to electrify the commuter rail network, within Colombo.  This includes the Main-line segment between Colombo Fort and Veyangoda.
Most of the line currently operates on a lock-and-block signaling system.  The commuter rail section was upgraded to electric signalling in the mid-twentieth century.  The system is connected to a centralised traffic control panel at Maradana Railway Station.
Main Line (Sri Lanka)