Driver's License Test Prep
Texas Practice Road Markings

You are driving on a Texas interstate highway. What does a solid yellow line at the LEFT edge of your lane tell you?

A single solid yellow line running lengthwise along the upper edge of a dark roadway.
  1. A.
    The lane you are in is about to end
  2. B.
    A shared left-turn lane begins ahead
  3. C.
    Passing on the left is allowed when clear
  4. D.
    Driving to the left of the yellow line is prohibited Correct
The Why

The answer is "Driving to the left of the yellow line is prohibited"

The manual says the solid yellow line on the left edge of the road is a guide indicating driving to the left of that line is prohibited. Drivers who read it as passing permission are carrying the broken-yellow center-line rule to the edge stripe, but the color is doing a different job at the pavement edge on an interstate.

Why the others miss

The traps in the wrong answers

A. The lane you are in is about to end

An ending lane is signaled by a merge sign and lane-drop striping, not by a solid yellow line at the left edge. This answer fills every marking question with a lane-drop answer because ending lanes get more study time than edge stripes do.

B. A shared left-turn lane begins ahead

A shared left-turn lane is marked in the center of the road with turn arrows, not by a solid yellow line at the road edge. This answer attaches the word 'left' to left-turn lanes because that pairing is the driver's most-practiced association.

C. Passing on the left is allowed when clear

The manual makes the solid yellow edge line a prohibition, not a permission; you may not drive to its left at all. This answer carries the broken-yellow center-line rule onto the edge stripe and reads it as an opening to pass.

The Rule

This question tests your knowledge of Road Markings in Texas. Source: Texas Driver Manual, "Pavement Markings - Solid Lines," p.34..

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