The minimum following distance behind another vehicle that should be maintained is typically 3-4 seconds. This allows enough time to react in case the vehicle in front suddenly stops or slows down.
30
You're talking about for vehicle breakdowns? You must have a minimum of three.
4 seconds
1 meter = 3 feet
There should be a minimum of 10 inches.
30 seconds
30
Driving licence
When you park your vehicle.
You should always check your gauges, seat belt, and mirrors after you start your car.
At minimum 3 seconds. If the road conditions are adverse, it should be 5 seconds or more.