Hey Chad.....here is what I did in one area of my layout that I had a roadway going nowhere. Unfortunately, it is not an urban setting.
The road crosses under two bridges and then "disappears" into a tunnel portal. I lined the road with trees to further make the scene darker and cut the roadway narrower at the portal. Putting the road and portal on an angle also helps to disguise the fact it goes nowhere. Obviously, the inside of the portal gets painted black.
The trick is to fool the eye to see what is not actually there with good placement of buildings, scenery items, cars, etc.
Hope that helps.