I attempted to make the roads look better by fooling around with the texture.pcx file. Unfortunately the roads came out multicoloured. Clearly there is more to it than I thought. Can anyone suggest a solution?
When I tried making roads black with white dividers, I got multicoloured roads. Are your roads black as well? Then I suggest choosing a very dark grey colour, and make sure that it doesn't come out as black if you have to decrease the number of colours when saving the file.
Although, after having achieved this, I found that those near-black roads didn't look that good after all. But go ahead and try it out