Mumbai local trains get GPS-based signal system for error-free operations

In a major safety initiative the Signal Location Announcement System (SILAS) is being upgraded in the driving cabs of all EMU trains to assist Motormen in error-free train operations.”

What is SILAS? How does it work on Mumbai local trains?

The SILAS is a GPS-based system that assists Motormen by announcing the signal number of the upcoming signal along with its position — Left/Extreme Left/Right/Extreme Right. It is based on the train’s live location. Currently, this advanced system is under upgradation across the Mumbai Division.

The new system will provide signal alerts by announcing the signal number and its position at 350 metres and 250 metres before the train approaches the signal. According to Railways, audio alert is given on passing a “Yellow” signal. “it repeatedly announces “Be careful, next signal is Red” until the next Green/Double Yellow signal aspect,” it said.

It further said that Audio recordings, GPS coordinates and locations of all signals for each route are pre-loaded in SILAS. “The Train Manager selects the appropriate line — Down Local Line(slow line), UP Local Line, Down Through line (fast line), UP Through line , etc. — before starting the trip.

Based on the journey selected by the Train Manager, it announces the next halt station 500 meters and 250 meters before arrival, e.g.,  “Next halt: Thane,” reads the statement. The official said that the feature is currently under development and can be modified based on observations and reports during trial runs.

Key features of SILAS

• Assistance to Motorman: Provides real-time audio alerts for signals and halt stations, aiding safe train operation.
• Driving Behavior Analysis: Monitors instantaneous speed at critical points like yellow signals, platform entry, PSRs, and neutral sections. This data is used for counseling Motormen to improve safety and driving skills.
• Real-time Train Tracking: Enables live location and speed monitoring of EMU trains for operational control.
• Mumbai suburban Motormen perform a ‘Single-man job’ under extremely challenging conditions. SILAS is being upgraded to act as an electronic co-pilot, reducing stress and enhancing safety by ensuring no signal is missed.