Abstract-This paper describes about the design and
implementation of the Computer Assisted Railway Control
System for Sri Lanka Railways. Currently, the train traffic
control system of Sri Lanka Railways has two control units.
They are Outstation and Metropolitan control units. In the
outstation unit, TDG (Time Distance Graph) is used to
visualize the train movement and make decisions. Controllers
spend more time in manually plotting the TDG than decision
making and for reporting purposes the same data is re-entered.
This leads to more time and money consumption. In the
metropolitan unit, switch boards in illumination based panel is
used to monitor and control train traffic. This panel has many
drawbacks such as congested layout, unclear information and
unreliable bulbs and switches. So at the end of the day, all
these problems contribute to trains getting delayed. The
proposed system is built using 4-tier networked architecture
which addresses the aforementioned drawbacks and
bottlenecks. Features such as TDG, TDG Designer, Track
Designer, Dispatcher Control View, Rules Editor, Train
Timetable, Traffic Control Playback, Auto Train Supervision
and Reporting have helped to improve the overall operation of
Centralized Train Traffic Controlling of Sri Lanka Railways.
Moreover, the solution comprises a high performance and
more reliable hardware unit with higher 110 capacity that
provides a hardware interface between the proposed system
and the existing electromechanical interlocking system. The
solution was successfully tested at Maradana Control Office
and Dematagoda Workshop with the presence of senior
officials from Sri Lanka Railways and proved its potential for
implementation.