> Traffic doesn't necessarily happen because there are too many cars on the freeway, but too many cars on the much more limited capacity streets which back up o

> Traffic doesn't necessarily happen because there are too many cars on the freeway, but too many cars on the much more limited capacity streets which back up onto the freeways That is true in the USA, which has absurdly short on and off ramps, but in my experience, many other countries around the world don't have this problem. Canada, Australia and the UK all have much, MUCH longer on and off ramps, and traffic doesn't back up onto freeways. Freeways still clog up, however.