Comment by metalman

vastly simpler to build the road up on pylons for a few miles. 1, build new road on pylons beside the old road for a few miles. 2 ,switch traffic to new road on pylons. 3 , rip up old road 4 , build some fences ,plant some grass and shrubs 5 ' repeat in each eco zone and local water shed and other areas where there are lots of critters....too chicken to cross the road