Congestion can also be caused by too little free capacity to even maintain that distance... Which is what typically happens where I live. There's a bridge wit

Congestion can also be caused by too little free capacity to even maintain that distance... Which is what typically happens where I live. There's a bridge with four lanes. Two of the lanes split off to an exit which includes another highway junction. Two other lanes continue, and are joined by a third lane from the other highway. This turns almost the entire bridge into a parking lot every afternoon. Even on the weekend, this interchange will typically be backed up. https://www.google.com/maps/@27.9445375,-82.5425725,1869m/data=!3m1!1e3 https://www.google.com/maps/@27.9445375,-82.5425725,1869m/da...