To the uninitiated, a local road map can look like an unending maze. Don't panic. While different maps will have different road classifications, they all generally work on one basic system: the bolder the road appears on the map, the more prominent it is. After you've found your location and destination on the grid and consulted the key, decide on your route by picking from these main road types:
Primary roads are usually marked with the boldest line (unless a highway passes through the town or city). These are main thoroughfares for the area. They're built for speed and usually
have double lanes for each direction of traffic.
Secondary roads are marked with a less bold line. These are also for rapid transit, but are typically two-laned and can move through residential areas as well as business districts.
Minor roads are usually marked with a gray line. These are slower routes, but they can sometimes provide a good shortcut or a more scenic
Unpaved roads and trails are great for scenic trips. They're usually marked by a broken line. Just make sure they aren't private (these
should have a special classification), and if you're driving, make sure cars are allowed, and that there aren't any seasonal restrictions, like
flooding or snow.