I think it's more the failure to start driving soon enough and fast enough. People wait and wait and then go and then go slowly, instead of moving as soon as po

I think it's more the failure to start driving soon enough and fast enough. People wait and wait and then go and then go slowly, instead of moving as soon as possible and faster. That adds up over the course of many cars. I see it every time I get to the area of slowdown (like one lane into two lanes). People just go slooooooow there.