> You can't build a light rail with electrified third rail cars, that requires RoW separation.

So? Philly's trolleys run underground and they're fine. What's wrong with our light rail isn't that it's light rail, it's that it was built largely as a gimmick to get suburbanites to Camden Yards.

The problem with trying to do HRT across the city is that it's currently totally unaffordable, both in terms of what it costs and any realistic source of revenue for such a project. So if there is any feasible way to still build the version of the red line that Hogan asked, it's worth doing not least because we have absolutely no idea when federal money may be available again.