When is it illegal to drive below the speed limit?

1. When driving slowly disrupts the normal flow of traffic ✓
2. When in heavy traffic in a construction zone
3. Only when driving in rural areas.
4. When driving under adverse weather conditions

Answer: A. When driving slowly disrupts the normal flow of traffic

It is illegal to drive below the speed limit when driving slowly disrupts the normal flow of traffic.

Why this is the answer

The handbook says driving too slowly is against Florida law. It explains that you may not go so slowly that you hold up or delay traffic that is moving at ordinary safe speeds. It also tells you to drive with the flow of traffic within the speed limit. So the illegal part is not simply being under the posted number; it is interfering with the normal, safe movement of other traffic. If you are slower than the flow, the handbook says to keep right so others can pass.

Why the other answers are wrong

• B. When in heavy traffic in a construction zone — The handbook does not say slow driving becomes illegal because of heavy traffic in a construction zone; its rule is about blocking or delaying traffic moving at normal, safe speeds.
• C. Only when driving in rural areas. — The handbook does not limit the slow-driving rule to rural areas; it states generally that driving too slowly is against Florida law.
• D. When driving under adverse weather conditions — Bad weather is not the trigger in the handbook; it tells you to increase following distance in unfavorable weather and to slow gradually, not that driving below the limit is illegal just because conditions are poor.

Remember it

If other cars have to slow down because of you, you are going too slow; keep right and let them pass.