downtown rail mostly elevated, some at-grade

[Crawford]

Originally Posted by Gantz

There is already light rail in NYC suburbs. I think that light rail even goes through downtown Jersey City at grade level.

For a small section, yes. Most of the Hudson-Bergen rail is elevated or on an embankment, but there's a street-running section. Also a subway tunnel section.

Newark City Subway is all subway or trench, though.

I believe the BQX would have extensive at-grade, street-running sections, though, so this could soon change on the NY side. The HBLR expansion north to Tenafly, NJ won't have anything at-grade.