Anyway, their argument — that their experiment proves the absurdity of the 55 mph law — is flawed. It didn't prove that at all. All it proved is that if you form a rolling blockade, it's going to create a traffic jam. It would have had the same effect at 65 mph. Plus, it's definitely against the law to form a blockade like they did. Only the police are allowed to do that. So they weren't actually obeying the law.
I realize that pranks are supposed to be obnoxious and annoy some people. But delaying innocent commuters, and creating a situation in which people could easily have gotten hurt as anger escalated, just doesn't seem quite right to me. Though this is probably the angry driver inside of me feeling that way. (One more thing: at the beginning of the video they misspell the word obedience.)
Update: Some quick googling, and I found the section of Georgia law (code 40-6-40, section D) that applies to what they did:
No two vehicles shall impede the normal flow of traffic by traveling side by side at the same time while in adjacent lanes, provided that this Code section shall not be construed to prevent vehicles traveling side by side in adjacent lanes because of congested traffic conditions.
So it was illegal, and they made a video of themselves doing it. Not too smart.
Update 2: David Spear, a spokesman for the Atlanta Police Department, has been quoted as saying that what the students did was legal:
David Spear, a spokesman for the state Department of Transportation, said if the students weren't blocking emergency vehicles and were going the speed limit, "they didn't do a thing wrong." Spear added that the speed limit was lowered to 55 because it saves lives. "In Atlanta, the actual effect of it is we expect the people going 75 to move over so the people going 95 can have the right of way," he said.
So I guess I was wrong. Though I'm still having a hard time understanding how it can be legal, when the code referenced above seems to state that it's not legal.