There are safe drivers who drive fast, and there are unsafe drivers who drive fast. You cannot justify being a jerk slowing everyone down because you don't like unsafe drivers.
The latest project work I have taken on, well isn't for a local small business, it's a project that requires coordinated effort spanning, I'm not joking, between 2-3,000 people. Minutes absolutely matter, especially at the top. Minutes have massive ripple effects down the chain, which when saved, gets work accomplished a lot quicker reducing stress levels of a lot of people, and gives a lot of people a lot of extra free time to enjoy life.
A minute at the top might cause the next level down to be delayed by 10 minutes, the next level gets delayed now by 30 minutes. By the time the ripple hits the bottom, the work may be delayed for an entire day.
BTW, this project is getting a gsib in compliance with federal regulations. Something I can bet you personally wished had been accomplished ten years ago, let alone 2016.
Bottom line is don't waste other people's time, simple as that