UPDATE: Ah, WTVD tells me that southbound I-85 is closed due to a wreck. Can't imagine that anyone would have been speeding on that stretch of road.
UPDATE: WRAL sez:
Durham, N.C. — All southbound lanes of Interstate 85 are closed in Durham at Duke Street due to a wreck, the state Department of Transportation said.
The closure began at about 5:25 p.m. and was expected to last until about 7:30 p.m.
Police have said that the wreck involves a tractor trailer and multiple cars.
Traffic was at a standstill, backing up from milemarker 176. Authorities advised drivers to avoid the area if possible.
Looking at the traffic cams, it appears that traffic is backed up beyond the 70/I-85 split southbound within the first half hour of the wreck. If it takes another two hours before the lanes are opened, how long will it take to clear the jam? Can't believe my queueing theory skills have deserted me?