Funding roads (taxes, user fees etc)

[danbrotherston]

Of total, no. But add $2B to the budget deficit, and it's much less good.  Patching it with HST would require an increase in the provincial portion from 8% to 9%, for example.

Right, that's true. It would mean increasing the deficit by 20% (or thereabouts- obviously the deficit fluctuates year to year). It's definitely true that that revenue will have to be replaced, somehow.

This isn't the point though, at least not my point, we're considering how much the gas tax contributes, because it is the only money that could even be considered a user fee for roads.  

The same thing applies to cutting transit fares to zero.

By the way, it's worth noting that gas tax revenues are going to zero in the next ... maybe 30 years or so, given that electric cars are likely to be rapidly overtaking gas cars.  Unlike transit fares, which will probably remain, and drivers will continue to whine about how much they're subsidizing transit riders.