Texas Car / Permit practice question · Speed & Space Management

Even when you are within the posted speed limit, Texas law says you must:

Answer choices

• never drive below the posted limit
• keep pace with the fastest cars
• slow down when rain, traffic, or other conditions make that speed unsafe— Correct answer
• stay only in the left lane

Why this is the answer

A posted limit is a maximum designed for normal driving conditions. During heavy traffic, bad weather, low visibility or other poor conditions, you must adjust both your speed and your following distance to avoid a crash. So driving exactly at the limit can still be unsafe, and keeping pace with the fastest traffic does not excuse it.

Source: Texas Driver Handbook — Speed and Speed Limits

Content reviewed against official driver handbooks · August 12, 2026