Haven is a headache

You don't have to avoid Haven Avenue during its grade separation project, but you might as well.

The city is separating rail and vehicular traffic on Haven, putting the tracks on a bridge and having the cars go underneath. The construction has already begun and is expected to last until next December.

So if you're at the south part of Haven (say you work in a newsroom on Fourth Street) and you're traveling north (say you go to City Hall often), you should avoid Haven altogether. Even though one or two lanes are opened in both direction, the area is pretty congested.