Cops have been doing something like this for a long time. Most times I have gotten pulled over for simple speeding there is always a question about where I'm go

Cops have been doing something like this for a long time. Most times I have gotten pulled over for simple speeding there is always a question about where I'm going, where I'm coming from and sometimes a few more "casual" questions as well. And I'm not even suspicious looking. I also wondered why where I was coming from had any relevance to the speed I was currently driving but always sort of figured it was some kind of fishing technique.