Commuters are being warned to expect delays on O-Train Line 1 in the east end. OC Transpo says there is an “operating issue” on Line 1, and the O-Train is only operating on the eastbound platform at Tremblay Station. “Please listen to on-board and station announcements for more information,” OC Transpo said. The issues with Line 1 come after issues shutdown service on Line 4 to the Ottawa Airport twice last week. Line 4 service was temporarily suspended for two hours on Saturday due to a switch issue. There was also a technical issue with Line 4 on Friday.