Rev Up for 2026: Delaware Defensive Driving Test – Drive Smarter, Not Harder!

A single white pavement line marking is used primarily to separate lanes of traffic moving in the same direction. While a double solid white line indicates that lane changing is not allowed, a single white line allows for lane changes but serves as a guideline for drivers to be mindful of maintaining their position relative to other vehicles. Therefore, the single line communicates that while changing lanes is permissible, it should be done with caution. This marking helps in maintaining the flow of traffic while ensuring that drivers recognize the boundaries of their lane.