For those of y'all that are using manufactured N Scale highway products, how wide are the roads? What brand of product are you using? Noch, Busch, Bachmann, Woodland Scenics, others? I'm laying out my scenery and I want to allow for use of these, but don't want to buy anything until I'm ready to lay them in place. Knowing the width, I'll be able to provide the space in my scenery. Thanks!