It's one of the main selling points, when Mayor Tory is talking about road tolls or other 'revenue tools' in this city.
Especially when they'll be used to fund public transit.
Tory touts that it will help ease congestion.
But does an increase in public transit actually lead to a reduction in traffic?
Not really.
"The evidence is very mixed as to whether or not it actually causes congestion to go down." says public transit consultant Jarrett Walker.
But he says the odds of it working actually improves when you add in road tolls.
"What road tolling does is gently encourage people to look for alternatives to driving."
However, he follows that up by saying you need to have a strong public transit system that would support those extra bodies who would be leaving their cars at home.
That doesn't exist right now in Toronto.
"It's somewhat limited. I think people who would shift because of road tolls, are people who are going places that transit already serves relatively well." says Walker.
NEWSTALK1010 also found a study published in 2003, by the World Bank Development Research Group who looked at 26 states, and found that unless there is a rail or subway stop close to people's homes, they aren't likely to change their habits.