Make sure you have good safety equipment, even for such a short ride.

Three hours ago I was riding the roughly 2.5 miles to my LBS, and I got hit by a damned SUV. I'm okay, though I'm developing a magnificent bruise, but yeah... shorter errand ride than yours and I got hit.

Amusing part for me is I was hit by a vehicle behind me and on my left, while I was going to the LBS to get a mirror so I could see what was behind me and on my left.