Yes, definitely.
While spending millions of hours sitting at Northern Virginia stoplights, it was obvious to me that the roads had tons of unused capacity. Everyone was just sitting at stoplights while most of the pavement gathered dust.
It is even more obvious from the air. Route 7 looked less than 50% utilized at evening rush hour. But I know from the ground you were sitting in a pack, looking at each other, slowing for the next light.