Guide signs on the road are designed to help drivers with what?

Guide signs are primarily designed to assist drivers in navigating the roadway system, providing vital information that helps them reach their destinations safely and efficiently. These signs typically indicate directions, distances to upcoming locations, and points of interest, which are essential for maintaining safe travel conditions. By offering clarity on which route to follow, guide signs help prevent confusion and enhance overall roadway safety.

While the other options might seem related to aspects of driving, they do not align with the primary purpose of guide signs. Understanding traffic laws is more directly related to regulatory signs; finding parking spots is often assisted by specific parking signs or symbols rather than general guide signs; and avoiding toll roads is typically indicated by specific routing signs or advisories, not general guide signage. Hence, option C is the most accurate representation of the primary function of guide signs on the road.