全文： http://www.popsci.com/node/43115?cmpid=enews020410
Step 1: Transportation
Cars that Report Potholes
Task: Fix the third of major roads that are in poor shape
Status: Three years to a prototype
Roads that De-Ice Themselves
Task: Reduce the 1,300 road deaths a year from snowy and icy winter
conditions
Status: In testing by more than 20 state departments of transportation
Bridges that Flex on the Fly
Task: Upgrade the 26 percent of decrepit bridges
Status: Pedestrian versions exist; traffic bri
