I'm sure you came up with those numbers out of a hat. There is no way anyone would know how long it would take without doing a full survey of the whole United States and its roadways.
Demolishing roads will take as long as it took to build them, if not longer since Dinamite can never be used near homes and buisnesses.
Saudi Arabia says PLENTY OF OILYup - there is no oil shortage. The huge rise in prices has been engineered by oil-men bush and cheney. THATS A FACT. Top Saudi Says Kingdom Has Plenty of...
If anything it would be just like tapes and CDs. Once the CDs started rolling in, the use of tapes slowly declined over time. I would imagine that a good quarter of Americas roads would become abandoned and funding for keeping them going would halt. All of the rest of the roads that are needed and used will continue to remain.
In this country, peoples needs and desires rule over what takes place. So long as it's profitable. Capitalism and all.
government to build interstate-like rails that we could all use at high speed, it'd probably take 30 - 50 years to complete a system that would replace all the interstate and US highways. Might take less for just the interstates, but they aren't interesting for driving anyway. US101 along the Pacific is interesting - not I-5.
