The way governments are run there is no way to break even with a $0.50 toll.  For starters, hundreds of millions are needed to design and build toll booth and other required road infrastructure to enforce tolls. Next, pricey union labour is needed to operate complex tolls (eg. count change) 24X7 (just imagine the OT and shift premiums).  Toronto can't even figure out how to fund the repair of Gardiner nor install the multi-billion dollar Presto system on its buses.  You think they can make tolls work for $0.50 a trip?