Read this: awesome information. Here for exactly what you want to do.
The DIY Guide to the Haul Road, By Steve Opat - Journal of Mountain Hunting
That's a good article, but I beg to differ when he says there's "one big hunk of American steel and ingenuity that will parallel you the entire way north: The Trans-Alaska Pipeline".
"American steel", that's factually incorrect, although most of us would likely wish it to be true.
The Trans-Alaska Pipeline was built of Japanese steel.