if it works, don't change it Idling cars at stoplights doesn't work. It adds unneeded pollution and wastes fuel. If there were an efficient way to avoid that,

if it works, don't change it Idling cars at stoplights doesn't work. It adds unneeded pollution and wastes fuel. If there were an efficient way to avoid that, it would be stupid not to. That's why they changed it. What shocks me is that this is the first you've heard of it. You've never heard the car next to you shut off when they pull up to a light?