A placarded New York CDL driver arrives at an incident scene where vapor is blowing across the road from a leaking package. What is the best first positioning decision?

1. Stop downwind so responders can see the vehicle clearly
2. Park uphill and upwind if possible, keep people away, and use the shipping papers and emergency response information for responders
3. Drive through the vapor cloud quickly before traffic backs up
4. Open the leaking package to identify the product before calling for help