When driving behind another vehicle under ideal driving conditions, you should follow the ____ rule.

  1. Two-second ✓
  2. One-second
  3. Half-second
  4. Half-mile

Answer: A. Two-second

Under ideal driving conditions, follow the two-second rule.

Why this is the answer

The manual's space-cushion guidance says to pick an object ahead, such as a sign or tree. When the vehicle in front passes it, count slowly to two seconds. If you reach that object before you finish counting, you are too close. In bad weather or behind large trucks, the manual says to add time and count three or four seconds. The bank answer matches the good-conditions count.

Why the other answers are wrong

Remember it

Pick a sign or tree ahead; if you reach it before you finish counting to two, you are too close.

Official handbook: New York State Driver's Manual (MV-21), Chapter 8: Defensive Driving – Allow Yourself Space

Explanation drafted with AI (deepseek-flash) from the official handbook passage cited above, then checked automatically and by a second model on 2026-10-23. Always confirm with the official handbook.