No, but I saw a web site with a company trying to change that. They make electric cars that are super thin, so two can fit in one lane! Check it out...
http://www.commutercars.com
AnotherThis depends on which way you mean that: Side-By-SideCars are not meant to travel of fit side by side in one lane, hence the invention of lanes. I have noticed though, that if the two cars in question were either motorcycles of motorcycle-sized, then it would most definitly be possible, though the legality of the situation is rather questionable. One-In-Front-Of-The-OtherCars are designed to fit one in front of the other in one lane of traffic, hence the convenient car-widthed lanes. Therefore it is a plausible conclusion that the two cars would fit.Chat with our AI personalities