I have this:
Amazon.com
I wear it whenever I ride my bicycle, during the day (I don't ride my bike at night). We don't have sidewalks in our neighborhood, but we do have front lawns. If I see a car coming I just take a step onto the front lawn of whoever's house I'm passing, or step into their driveway. No need for a safety vest. If they're not paying attention to the road itself and veering off onto peoples' lawns, it won't matter if I'm lit up like a christmas tree or not.