Because people from NJ put billions into the NY every year via income tax (no reciprocity with NY, hell they’re even coming after new work from home people) and tons of tourism etc. Its in NY’s best interest to accommodate NJ.
but on the other side people living in NY have to endure it. You can not just make the people living downtown dependent on the woes of the commuters. I can not imagine driving into NY as a large share of commuting mobility to make sense...it's just too big and dense
Yes, but it’s complicated by the fact that a lot of infrastructure funding is done at the federal level, which should in principle care about people in NY and NJ equally.
At least one of the entry points to that relatively small area is a border crossing between NJ and NY, so I think even if the feds don’t own the infrastructure involved (IDK if they do or not), they at least had to sign off on it.