TTC chairman Adam Giambrone is optimistic a transit strike can be averted after a report that talks have slowed and are not going as planned.

"It's very emotional for everyone at the table because you get a high one day because it's going so well and the next day you get bogged down, so you get those frustrations and excitements back to back," Giambrone told CTV Toronto on Tuesday.

"We're working, we're committed to getting a deal that works for Toronto and for our employees."

Both the union, which represents 8,500 drivers, ticket collectors and maintenance workers, and CUPE Local 2, which represents another 500 workers, have been in a legal strike position since April 1.

One key issue for the ATU is compensation for injured or assaulted workers who don't receive full pay if they have to miss work.

The TTC moves more than one million riders each weekday.