Agree. Tolls (assuming they means the same thing as tariffs) can also create the critical mass necessary for commuter bus lines to work, thereby allowing people to spend only a little more than they do now on commuting but get there faster since the roads are cleared. (The per person effective toll would be lower on a bus, even if they are charged by size.)

But they would have to be much higher than in most proposals, and they should be much lower or non-existence during hours when they're not choked despite the zero price.