Reality and fiction are uncomfortable companions, one often finds.
Part of our walk from Alfriston to Charleston was on the old coaching road from Seaford to Lewes. Both of these pictures are of the road. It was perhaps 8 feet wide most of the way, with huge ruts and thorny bushes on either side. It really takes the romance out of imagining riding in a coach. Even the most luxurious and well-sprung coach would have been incredibly uncomfortable on this terrain. Easy to see how a highwayman could have stopped one. Also easy to see how difficult it would have been to overtake or even pass by in the opposite direction.
BTW - What looks like a snowy field, is actually a recently tilled field filled with chalk.