Bachuma Gate wrote:It depends on your budget. The lower side is to dig up and remove black cotton and lay hardcore.
true, hapa budget matters - removing black cotton for 500m and filling it up might turn out to be on the higher side. as long as drainage is catered for, i.e slanting the road kiasi - I think a nice layer of hardcore on top of the black cotton should suffice, adding red soil might not work since instead of sinking in as in the case of black cotton, cars would end up skidding where that ka red soil is.
Unless its a private road you will definitely have to talk to the local kanju guys.