Detailed proposals were submitted Friday from both Star Solutions and Flour, the two companies vying for the Interstate 81 improvement job.
The Star Solutions plan widens 81 to at least four lanes in each direction, with cars and tractor trailers separated by rumble strips and/or grassy medians.
The projected cost is $6.3 billion. Right now, it would be paid for with federal and state funds and a toll of a little over 20 cents a mile for trucks. However, cars could be tolled as well, if Virginia state law is changed to allow it.
The Flour plan expands the interstate to three lanes on each side, with one "cars-only" lane on each side.
Cars and trucks would pay tolls in this plan - but there's no word yet on how much that toll would be.
VDOT is in the early stages of a required environmental study, and there are still questions about how soon construction could start, even after a plan is chosen.