On a New York State highway where there is no posted speed limit, the fastest you may legally drive is:

  1. 50 mph
  2. 55 mph ✓
  3. 60 mph
  4. 65 mph

Answer: B. 55 mph

On a New York State highway with no posted speed limit, the fastest you may legally drive is 55 mph.

Why this is the answer

The New York State Driver's Manual says that when no speed limit is posted, you must not drive more than 55 mph. It also notes that an expressway's limit is normally 55 mph, though 65 mph can appear where posted in some rural areas. The question asks about a highway with nothing posted, so the default ceiling is 55, not a higher posted rural limit. The manual also warns that conditions can make even lower speeds the safe choice, but that does not raise the legal maximum.

Why the other answers are wrong

Remember it

Think "no sign, five-five": when the road is silent, the highway ceiling stays at 55 unless a sign raises it.

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

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.