If Toronto-Montreal ( with possibly a stop in kingston) is yhe only viable hsr, then that is what should be built. Downtown to downtown in 2.5hrs max. If not 2 hours at 270kph. If via's hfr needs dedicated rail anyway build it as highspeed and be done with it. Regional rail can feed into toronto and montreal or even kingston on existing rights of way. We have to stop trying to provide infrastructure the same to every small town,the same as it is in large cities...not financially feasible!