What does a bolder line representing a road or highway mean on a map?

A bolder line on a map indicates that the road or highway is significant, often suggesting that it is a major route with higher traffic volume. This typically translates to a larger road designed to accommodate more vehicles, which may include highways and thoroughfares that connect larger urban areas.

The thickness of the line serves as a visual cue for the driver, allowing them to easily identify key routes that are critical for travel. Such roads are often equipped with multiple lanes, traffic controls, and are prioritized for maintenance and accessibility, making them essential for efficient transportation.

In contrast, thinner lines on a map typically represent smaller, less busy roads that may be more local or rural, emphasizing the differences in road importance and usage.