Yes, if you need to GO, call up on the radio your allowed unlimited 20 minute personals as long as you call it in... 95% of the time we try to make it to the end of the line but if not even if your in service if nature calls, you gotta answer lol. After all the bus is our office.
It's kind of tough sometimes but we try for be considerate. I like to drink alot of liquid but you try to think of the time you will end up and the terminals and adjust your intake accordingly.