This is the internet age. You can find a study to support any argument you want.Those studies make two assumptions not applicable to the real world. First, they assume a constant rate of speed. Second, they assume sufficient spacing between cars. That happens approximately zero percent of the time. So what happens is that cars squeeze into spaces, causing drivers to brake, which causes the drivers behind them to brake, and so on. So squeezing in at the end ends up increasing traffic.