Railway Engineering

  1. Points and Crossings
    1. Function and Necessity
      1. Track Diversion
        1. Route Selection
          1. Operational Flexibility
          2. Flexibility in Operations
            1. Switching Operations
              1. Network Connectivity
            2. Components of a Turnout
              1. Switch Assembly
                1. Switch Rails
                  1. Movable Rails
                    1. Heel and Toe Design
                    2. Stock Rails
                      1. Fixed Rails
                        1. Switch Rail Interface
                      2. Lead Rails
                        1. Transition Function
                          1. Geometric Design
                          2. Crossing Assembly
                            1. Types of Crossings
                              1. Solid Manganese Crossings
                                1. Built-up Crossings
                                  1. Movable Point Crossings
                                  2. Frog Angle
                                    1. Wing Rails
                                    2. Check Rails
                                      1. Wheel Guidance Function
                                        1. Design Requirements
                                        2. Guard Rails
                                          1. Safety Function
                                            1. Clearance Requirements
                                          2. Types of Turnouts and Crossings
                                            1. Simple Turnout
                                              1. Design and Application
                                                1. Turnout Number
                                                  1. Speed Restrictions
                                                  2. Left-Hand and Right-Hand Turnouts
                                                  3. Diamond Crossing
                                                    1. Layout and Use
                                                      1. Acute Angle Crossings
                                                        1. Right Angle Crossings
                                                        2. Design Challenges
                                                        3. Scissors Crossover
                                                          1. Function and Design
                                                            1. Double Crossover
                                                              1. Track Spacing Requirements
                                                              2. Operational Applications
                                                              3. Gauntlet Track
                                                                1. Special Applications
                                                                  1. Design Considerations
                                                                2. Design and Layout of Junctions
                                                                  1. Geometric Design
                                                                    1. Track Spacing
                                                                      1. Curve Radii
                                                                      2. Space Requirements
                                                                        1. Platform Clearances
                                                                          1. Maintenance Access
                                                                          2. Operational Considerations
                                                                            1. Conflicting Movements
                                                                              1. Capacity Analysis
                                                                            2. Interlocking of Points and Signals
                                                                              1. Principles of Interlocking
                                                                                1. Safety Requirements
                                                                                  1. Operational Logic
                                                                                  2. Mechanical Interlocking
                                                                                    1. Lever Frames
                                                                                      1. Mechanical Connections
                                                                                      2. Electrical and Electronic Interlocking
                                                                                        1. Relay Logic
                                                                                          1. Computer-Based Systems

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                                                                                      3. Track Geometry and Alignment

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                                                                                      5. Railway Structures