Driver's License Test Prep
Texas Practice Speed Limits

According to the Texas manual, which entities are given authority to raise or lower posted speed limits?

  1. A.
    Only the Texas Department of Transportation.
  2. B.
    Only the Texas Legislature by statute.
  3. C.
    Any driver by formal petition.
  4. D.
    Cities and counties, among others. Correct
The Why

The answer is "Cities and counties, among others."

The manual explicitly names cities and counties as having authority to change posted limits, alongside the Texas Transportation Commission and regional mobility authorities. Choice B tempts drivers who assume speed laws only come from state-level bodies; that assumption skips the local traffic-study authority the manual grants to cities and counties.

Why the others miss

The traps in the wrong answers

A. Only the Texas Department of Transportation.

Names one authorized body while excluding the local governments the manual also lists. Guessed one central highway agency handles every Texas posted limit and missed the local list.

B. Only the Texas Legislature by statute.

Restricts authority to statute; the manual gives change authority to local governments too. Assumed only the Legislature can move a posted limit because state-level rules feel state-level.

C. Any driver by formal petition.

Grants a power to individual drivers that the manual does not provide. Mistook the citizen-comment step in a traffic study for a direct authority to reset a posted limit.

The Rule

This question tests your knowledge of Speed Limits in Texas. Source: Texas Driver Manual, "Chapter 8: Speed and Speed Limits - Speed Limits," p.46..

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