This one is near the starting area after the tutorial outside your first apartment, just to the north. This area is a common hub for Lorn (other players). ↓

This one is further east from the starting apartment, Ryan Mooney the repairman and the follower Bella Straugh live on this road. ↓

The financial district, only really useful for setting up investments and buying properties, but there are a lot of efficient routes that go through it that are worth knowing. ↓

A back alley just outside the western boundary of the financial district, a place you can frequently find black market dealers and hitmen. Someone also told me that this is one of the alleys where the Hatman entity can randomly spawn at night. ↓