For smaller roads in older eras, I use Walthers HO Cornstone streets. I have only used the concrete ones on my layout, but they make brick and asphault also I think. they come in pieces, about 8 inch long straights, and then crossings. There are also matching sidewalks.
While these are wide HO streets, I found that they make decent single lanes for O scale. Used directly, there is no parking lane. I also used the sidewalks, and laid double widths (side by side) which looked good to me.
The streets would not be so good if you want on street parking, unless you cut off the curb edges and used two side by side.
