Cedar point: breakdowns?

I went to CP today and great everything other than maverick being closed down, is that because they are getting a new track piece? and a lot of the rides broke down a lot. such as dragster i was in the gates 3 away and it broke down..got up 30 minutes later 2 cars went and then again it broke and they dont send a test car. how cant thye not send a test car when they fix problems with it? what happens when coasters have a 5-60 min breakdown?