Tutorial Exercise 6.1

Exercise Information

Two trains travel on a single track, on opposite directions. The track has a single lane and the two trains destination is on the other side of the track. Increment the main model by adding a detour, allowing both trains to avoid collision and reach their destination.

Step 1 Track Layout

To create the track layout, follow the steps below:

  • Drag 5 Rail objects to the model and connect them on a straight line.
  • Drag 2 Locomotives and connect them to opposite ends of the track using the "A" key.
  • Create 2 RailControlPoints at each end of the track.

Your model should be looking like this:

Exercise61Objs

Step 2 Processflow Configuration

In order to achieve the solution for the problem, you should create the following objects:

  • Create two Schedule Sources, configure them to release 1 train at time 0.
  • Create two AssignLabel, set the label name as "train" and the value as each respective locomotive.
  • Create two MoveTrains, set one for each Train.
  • Configure the MoveTrains to have the RailControlPoints as destination, on opposite sides.

Your Processflow should be looking like this:

Exercise61PF

Step 3 Collision Detection & Analysis

The first step to set collision detection is to drag any RailWorks object to model and create a RailSystem.

To access the collision settings, follow the steps:

  • Drag one Rail to the model.
  • Access the RailSystem properties and mark the "Train Collision" checkbox.
  • Proceed to set up a collision detection tick in milliseconds, 50 ms is a good startpoint.
  • With these steps, collision detection is now activated.
  • Run the model and identify the exact point where the trains collide.

CollisionSettings

Step 4 Mandatory Paths

In order to avoid the collision, do the following modification.

  • Create a detour on the collision Rail, using 3 Rails.
  • Connect them to create an alternative route to avoid traffic.
  • Alter one of the MoveTrain activity by ticking the "Use Mandatory Rails" checkbox.
  • Alter one of the MoveTrain activities to have the paralel detour rail as a MandatoryRail.

The MoveTrain activity should be similar to the image below.

Exercise61MoveTrain

Your model should be looking like this:

Exercise61alteration