**Tracks** 聽聽聽 The Tracks tab page allows you to define groups of rail blocks. Tracks are defined by one or more rail blocks. When a train arrives, it is assigned to a particular track. Because a track can consist of multiple blocks, you can model breaks in the rail lines (such as where roads cross the tracks) or curved tracks. You must have at least one track defined for a train to arrive in your model. Tab Page Details  Allocate Track - This pick list option enables you to determine the logic that assigns a given train to a track. By default, trains will be assigned to the first available track. Track Entry - This pick list option should return the amount of time it takes for a train to arrive at the track after it has arrived at the terminal. This is an abstract time between the scheduled arrival time and when work begins on the track. Track Exit - This pick list option should return the amount of time it takes for a train to leave the track after it has finished at the terminal. This is an abstract time between when the track work strategy is finished and when the train has left the track, making it available to be allocated by another train. Tracks聽 Tracks- This list shows the tracks that you have defined for your model. To add a new track, click the Add Track button at the bottom. To delete a selected track, click the Delete Track button. To edit a track, highlight it in the list. Track Name - This value is the name assigned to the track. Blocks Selection List - The All Blocks list contains all of the rail blocks in the model. Use the  and  buttons to add or remove blocks in the track. Blocks in a track are listed in the Track Blocks list. The ordering of blocks in the Track Blocks list is important. When a train arrives, it will cover the blocks from the top to the bottom of the list of blocks in the track. Diagram View - The tracks diagram view shows each of the rail blocks in your model and highlights the blocks in the selected area. This view helps you identify each block, so you can make sure each is assigned to the correct track. This view operates like a typical [orthographic view](Flexsim_Users_Manual.html) in that you can zoom and translate the view by using the mouse buttons. Blocks highlighted in red are members of the selected track. Blocks highlighted in yellow are the blocks selected in the All Blocks list. The block highlighted in green is the block selected in the Track Blocks list. Note: The view may appear blank at first. Try zooming out to locate the blocks. Then center them in the view before zooming in again.