nyc: It seems in nyc when they are redoing a street. They come in rip up the whole road, and leave it like that for a few weeks until everyones nice new car is destroyed by flying pebbles and rocks, and shocks, ties and rims are in need of replacement. Then 3 weeks later another crew comes in to lay down nice new asphalt. Everywhere else it seems like they do it all at once. Is there a reason why they do it differently here in nyc?|||In the ongoing quest to save money, and make expensive resources go farther, a machine specifically made to grind an inch or more asphalt off the top of an existing road surface is actually sent to a processor and is carefully ground up and mixed in with new asphalt and tar, and then heated and delivered to the job site, and a new layer of roadbed is layed down and sealed with hot tar and a new high tech road is ready for 20 more years of traffic. The new mixture is about 80 percent of the old ground up asphalt and will tolerate years of abuse from almost any thing known to man. and can withstand heat and cold and wear and tear, The processing actually takes some time, you are talking about tons of material and some heavy duty equipment to build a new section of road.