i know its a work in progress, but you should try having a different pavement texture so its not the same as the road.
also keep in mind that since this is a zombie map and treyarch rarely put a street that is just 2000 units long because players would just do massive rapetrains and grow bored of the map in 20 rounds to try narrow down / put choke points to make the gameplay interesting each time.

Understandably this is literally first images but that means it can only get better from here so hope small feedback can get you long way
will check in after a week+ or so and see how its going. Happy mapping till then m8!

looks like a nice map