New types of business and recreational road will emerge, starting from the segregation of heavy freight onto new road types. Specially designed beach roads, and green forest roads, are possible examples. Intelligent Transportation and the National Information Infrastructure. MIT Press, 1996. The imminent changes in roads are not just a public-relations redefinition of the transport chain.
Green roads are different.
Green roads can be sustainable roads, integrated in a park-like corridor, as proposed for new infrastructure in the Netherlands. As road tunnelling costs fall, more and more roads will go in tunnel. Not only that, but environmental campaigns will begin to force relocation of existing roads in tunnel. At first sensitive links, then major roads, then regional roads, will be relocated in tunnel. In turn, tunnelling facilitates the construction of separate roads targeted at different types of traffic, and ultimately new parallel road networks.