Driver's License Test Prep
Florida Practice Warning Signs

A yellow diamond warning sign lists a height in feet and inches above a road structure. What does the Florida manual say the sign requires?

  1. A.
    The shoulder drops off by the height shown on the sign.
  2. B.
    Trucks must come to a full stop at the marked point.
  3. C.
    Do not enter if your vehicle is taller than the listed height. Correct
  4. D.
    Overhead utility wires along the road hang at that height.
The Why

The answer is "Do not enter if your vehicle is taller than the listed height."

A low clearance sign forbids entry when the vehicle is taller than the height printed on the sign, so the driver checks the vehicle's height against the number before proceeding. The tempting wrong answer is the overhead-wire reading, because drivers see any height figure suspended over a road and picture the utility clearance markers on rural power lines rather than the structure ahead.

Why the others miss

The traps in the wrong answers

A. The shoulder drops off by the height shown on the sign.

Soft Shoulder warns that the ground beside the road is soft; the height on a low clearance sign refers to overhead clearance, not a shoulder drop. This answer reads any number on a warning diamond as a distance along the ground rather than a clearance overhead.

B. Trucks must come to a full stop at the marked point.

The low clearance sign controls whether a vehicle may enter based on height; it is not a stop-control sign. This answer treats a warning diamond that touches truck concerns as if it triggered a mandatory truck stop.

D. Overhead utility wires along the road hang at that height.

The sign marks a physical clearance above the roadway, not the height of any utility line above the shoulder. This answer pictures the utility-line markers on rural power runs whenever a height figure hangs over a road.

The Rule

This question tests your knowledge of Warning Signs in Florida. Source: Florida Driver Manual, "Warning Signs: Low Clearance," p.50..

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