New GO Transit bus terminal at Toronto’s Union Station to open in December She says the agency has also received questions from customers over whether they will need documentation to prove they are travelling for essential purposes.“The answer is no, nothing is needed,” Aikins said. “But we do ask them to travel for only essential reasons and to always wear their mask.”The changes along the three GO Train lines will see buses replace trains on evenings and weekends.There will also be reductions in service for UP Express, which connects Union Station to Pearson Airport, Aikins said.“As Ontario enters a newly announced state of emergency, GO Transit and UP Express service will still run as public transit is an essential service — however.