Speed & Move Over Law
⏱ ~3-min readAceMark Guide
What this topic is really about
A prima facie limit is presumed safe under ideal conditions, but driving at or below it can still be unlawful if conditions make that speed unsafe.
The Texas Move Over/Slow Down law requires drivers to vacate the lane nearest the stopped vehicle, or reduce speed if moving over is not possible.
See the mechanism
A prima facie limit is presumed safe under ideal conditions, but driving at or below it can still be unlawful if conditions make that speed unsafe. A diagram for this topic isn't available yet — the worked example below walks the same reasoning step by step.
An exam-style question, fully explained
In Texas, what is a 'prima facie' speed limit?
- Identify what the question tests: In Texas, what is a 'prima facie' speed limit.
- A prima facie limit is presumed safe under ideal conditions, but driving at or below it can still be unlawful if conditions make that speed unsafe.
- Eliminate the distractors that break the rule above, then confirm the remaining option.
Traps the examiner sets
- Read each option carefully — distractors on Speed & Move Over Law are designed to look plausible.
- Re-check the exact wording of the question stem before committing to an answer.
- Watch the qualifiers ("always", "only", "except") that flip a correct-looking option.
Test your recall
Answer each from memory — you'll see instantly whether you're right and why.
Run a focused 10-question mini-mock on Speed & Move Over Law and see it stick.
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