A person attending a placarded vehicle must do all of the following EXCEPT:

A Be within 300 feet of the vehicle with a clear view.

explanation

The person watching a placarded vehicle must:
- Be in the vehicle awake, not in the sleeper berth, or within 100 feet of the vehicle and have it within clear view,
- Be aware of the hazards of the materials being transported,
- Know what to do in emergencies, and
- Be able to move the vehicle if needed.