If you are a early morning outdoor exerciser I’m speaking to you.
Please ditch the gray and black clothes. In the dark and gray of early morning you blend into the pavement.
Reflective clothing is your friend. A flashlight, headlamp is your friend. In short, you want to be lit up like a Christmas tree so everyone can see you. And if you run “with” traffic, make sure that you have something on your butt so you can be seen from the rear.
Now go run! (wearing reflective gear please)