interstate 40 is jammed with travelers racing to get an early start on the summer weekend. but many drivers don't realize these snake-like curves near connolly springs, north carolina, can be difficult to navigate. even deadly. fire and rescue crews race to the scene of a tanker truck that has spun out of control and slammed into a bridge. as they get closer and closer, a thick billowing cloud of black smoke looms ominously on the horizon. >> we've had a lot of wrecks, single vehicle including tractor trailers and small passenger vex. vehicles. this is one of the most dangerous areas of interstate 40 in north carolina. this is one dangerous areas of interstate 40 in north carolina. >> traffic comes to a standstill. some motorists even resort to driving the wrong way in the emergency lane in order to exit the freeway from an on ramp. when firefighters and first