Heads up and looking around.
Look twice before entering a lane of traffic. If you're chipping roadside, you will likely want to swing long pieces around toward the chipper tray, and is an easy time to get a little too far out of your cones as you start to focus your attention on chipper awareness.
xpct txtng drivrs.
When I'm working in a two lane residential street (25-30mph typically) I block out as much space as possible that an emergency vehicle would have easy passage. On that kind of street people can slow down because people's lives are at stake. One lane. Slows people down when they aren't likely paying that much attention, just leaving or arriving at their house on autopilot. Sending that txt "leaving home", etc.
If anybody hassles me, I'll apologize for their inconvenience, and tell them about my neighbor who was run down at work on the road- brain injury, joint injuries, constant dull pain, often significant pain after working around the farm. He's unemployable and on disability, making the best that he can about it.
Ask anybody that has worked for me, they've heard about my neighbor's accident, and have been road-aware at work.
Unpredictable, high velocity steel masses pose the most danger in treework among skilled people, IMO.
Constant awareness.