Final answer:
Solid-white lines are used as edge lines that mark the road boundaries and as lane lines to separate lanes of traffic moving in the same direction.
Step-by-step explanation:
Pavement markings are critical for road safety, providing guidance and information to drivers and pedestrians. Among the types of pavement markings involving a single solid-white line are edge lines, which delineate the boundaries of the roadway, and lane lines, which separate lanes of traffic traveling in the same direction. These markings are designed for visual guidance to ensure that vehicles stay within their designated lanes and to prevent runoff-road collisions. Center lines usually involve yellow markings to separate traffic going in opposite directions, and crosswalk lines are typically two parallel lines that mark where pedestrians can safely cross the road. It is important for drivers to understand and respect these markings to maintain safe driving conditions.