Yep. A major arterial in my city is very obviously too wide for the traffic it carries, even during rush hour. I don't remember the exact number, but a study a few years ago found that the average speed was something like 12 MPH above the posted limit. People completely lost their shit when it was proposed to narrow it and put in bike lanes (the bike lanes weren't the point, but people were cycling on the sidewalk to avoid the impatient/distracted/aggressive drivers, and it would have been silly to not use the space for anything at all).