Which color on a topographic map typically indicates major roads and highways?

On a topographic map, the color red is commonly used to signify major roads and highways. This color coding helps users easily distinguish between various kinds of transportation routes. Major roads and highways are typically more prominent and essential for navigation, making red an effective choice for highlighting these features. The visibility of red on a map allows for quick identification and is particularly useful for travelers or individuals planning routes.

In contrast, black is often associated with smaller, less significant roads or buildings; brown is usually reserved for contour lines and elevation changes; while green often represents vegetation areas or parks. Understanding the color conventions on topographic maps is crucial for effective interpretation and navigation.