Some drivers complain that the lack of co-ordination is a major, daily frustration.
"You stop at every light and there's no cross-traffic," said one driver. "You're just sitting there wasting your time,"
A recent study showed better co-ordination on two downtown streets did have an impact.
"We've seen improvement on Richmond and Adelaide," said Miles Currie, the city's director of transportation services.
"We've reduced stops and delays and emissions significantly, so we're going to expand to over a 1,000 signals over next three years."
Currie says drivers will notice a difference.
"If you are driving at a safe speed [40 kp/h] you should be able to drive through a zone without stopping," he said.
The city has also identified intersections that it hopes to improve.
Recently city council was given a list of the 10 worst intersections for pedestrians.