Delaware Defensive Driving Practice Test 2026 - Free Defensive Driving Practice Questions and Study Guide

The correct choice highlights that both single and double solid white lines share the purpose of indicating the same driving behavior, specifically regarding lane usage and restrictions. Solid white lines indicate that lane changes are discouraged or prohibited. A single solid white line signals that drivers should stay in their current lane but may change if necessary and safe, while a double solid white line reinforces this by indicating that lane changes are not permitted.

The context of the other options further clarifies the significance of the correct answer. While both single and double solid lines serve the function of lane separation, the key distinction lies in the degree of restriction they impose, which isn't accurately captured by simply stating that both are for lane separation. Additionally, passing is clearly not allowed with double solid lines, making the suggestion that both types allow passing incorrect. Finally, the implication of no parking is not inherently tied to the presence of white line markings, as these lines are primarily focused on lane discipline rather than parking regulations.