Railway Interlocking System

Name: Patel Kavyakumar Shaileshkumar
Subject: Event-Driven Concurrency (EDC)
Project: Programming Assignment 2 – Railway Interlocking

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Project Overview

This project is about building a Railway Interlocking System that safely manages train movements on a shared track network.
It controls which train can move and when, to make sure there are no collisions, deadlocks, or unsafe transitions.

The system handles both passenger and freight trains and gives priority to passenger trains when needed.
Each movement step is done in small simulation "ticks", so every move is checked for safety before it happens.

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What the Code Does

The main file, InterlockingImpl.java, does all the logic work:

• Keeps track of which train is on which section.
• Finds the safest path from entry to destination.
• Checks if a train can move without blocking or crashing another train.
• Uses a "cooldown" system so that shared junctions don’t get used by two trains too quickly.

There’s also:

• Interlocking.java → an interface that defines what every interlocking system must have.

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Key Features

Safe and collision-free train movement
Handles both passenger and freight trains
Shared junction protection (sections 3, 4, 5, 6, 10)
Cooldown timer for busy sections
Detects and avoids deadlocks automatically
Works well with the autograder and covers 90%+ test cases

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