CORALVILLE — The city of Coralville will roll out its revamped transit system next week.Beginning Oct. 19, Coralville Transit users will see new routes and schedules. Much like Iowa City, which will consider an overhaul of its transit system in the coming months, Coralville is hoping to improve ridership through simplifying its old system.“We’re excited,” said Vicky Robrock, Coralville’s director of parking and transportation.