Expect disruptions on Ottawa's light-rail transit line during the first week of June as Rideau Transit Group conducts maintenance on the system.

The operator drove five buses serving several different routes in the three days before self-isolating, the head of OC Transpo said.

Amid the novel coronavirus pandemic, trains are running less frequently on the Confederation Line starting Friday. Changes to bus service levels begin Monday.

Pest treatment at both OC Transpo buildings began at 1 p.m. Thursday and they're expected to be finished by Saturday afternoon, the transit agency says.

OC Transpo says seven trains are in service Thursday afternoon, instead of the 13 needed for rush-hour periods.

Replacement bus service is running between Hurdman and Blair stations, according to OC Transpo.

LRT service was already short three trains going into the Friday afternoon commute and then two more trains were pulled off the tracks.

The request comes after the city confirmed it did give Rideau Transit Group a full payment for September, when many thought the group wasn't getting paid amidst unreliable train service.

The group that built the Confederation Line believes the bad odour is "due to stagnant water that is infiltrating into the tunnel near Rideau Station," OC Transpo says.

The Confederation Line's service on Tuesday marked the first time in two weeks that there wasn't a shortage of trains during either the morning or afternoon rush hours.