Ed,
What will you be using to "pave" the road? Although I used styrene on the Seaboard Central for roads, I'm not sure that I would want to cut all of those pieces for the amount of street trackage that you have. However, paper templates and tracings can be your friend.
That said, if it were me, I'd consider using Woodland Scenics' Smooth-It. I had success with that product for the roads on the Virginia Central. According to
@RockGp40's photos of the M
3T, those roads are holding up more than ten years later.
Hope this helps,
DFF