Here's what you need to know about the O-Train shutdown and R1 service today

OC Transpo is detouring R1 replacement buses down Albert and Slater streets and launching a new shuttle bus from Lees Station to help deliver the "best possible service", as the O-Train shutdown continues for a fourth full day.

OC Transpo is detouring R1 replacement buses down Albert and Slater streets and launching a new shuttle bus from Lees Station to help deliver the "best possible service", as the O-Train shutdown continues for a fourth full day.

Ottawa's light-rail transit system has been out of service since Monday afternoon after an issue with an axle bearing was discovered on one train during a 50,000 km inspection.  OC Transpo ordered the immediate shutdown of LRT service for inspections on all vehicles and the track.

As of Thursday afternoon, 15 of the 45 LRT vehicles have been inspected.

"No issues have been discovered," Amilcar said.

"An inspection of the light-rail vehicle where the wheel hub assembly was identified uncovered no additional issues."

Amilcar said Thursday afternoon that Rideau Transit Group is discussing return to service scenarios with the city, but did not say when LRT service could resume. Coun. Riley Brockington said Amilcar is hoping to have a plan for LRT service to resume on Friday.

So as thousands of LRT riders are diverted onto buses, OC Transpo is making changes to the R1 bus routes.