At what minimal distance from a residential building or a public structure is it permitted to park a vehicle transporting hazardous materials?

1. Correct answer: 400 meters.
2. 300 meters when the vehicle is loaded; 50 meters when the vehicle is empty.
3. At least 50 meters.
4. 200 meters.

WhyA vehicle carrying dangerous materials may be parked no closer than 400 meters to residential and public buildings.