The Barrier panel defines the position of the barrier and lets you set a condition.
The following properties are on the Barrier panel:
Specify the size and position of the barrier.
Check this box to make a barrier conditional, and define the condition that is required for the barrier to be applied. When a barrier is conditional, its condition is reevaluated at the beginning of every travel task. If the condition returns false (0), then the barrier will not be applied in the route calculation algorithm, and the traveler will travel as if the barrier did not exist. Conditional barriers let you define certain barriers as only applicable for certain travelers, or based on certain model conditions.