On this playthrough I've decided to just wander around Watson a bit before the heist and keep finding streets I've never seen before, even on previous playthroughs where I walked everywhere. This particular street is practically subteranian and its a shame most of the content takes place at surface level or in the main streets when there are great environments like this hidden around the place where most players will never see them.
It's fascinating to see just how many little places there are like this one, places that just exist not for use but just to make the world feel real. Having all these empty spots that you've got no reason to visit is what makes the game feel alive.