Reset List
From TrainzOnline
When started, the Reset List rule starts all of it's child rules simultaneously and waits for all of the child rules to complete before restarting the process. This behaviour continues indefinitely.
When the list cycle is completed, the child rules are reset to their initial state before being restarted.
Reset List is one of several list rules for handling child rules in a specific way. See also Ordered List, Progressive List, Random List and Simultaneous List.