Answer :
some characteristics:
-They were cheap to construct.
-They were durable
-They were all-weather.
-They had smooth surface.
-They were wide
-They were straight
-They were well drained/curved/cumbered
-They were cheap to construct.
-They were durable
-They were all-weather.
-They had smooth surface.
-They were wide
-They were straight
-They were well drained/curved/cumbered