What is the purpose of a County Route sign?

The purpose of a County Route sign is to guide drivers towards local roads, thereby providing directions and aid in navigation within a specific county. These signs are typically used to designate routes that are important for local travel but are not part of the state or federal highway system. They help to connect various local destinations and facilitate access to smaller towns and communities. By marking these routes, County Route signs ensure that drivers can identify and follow lesser-known roads that play a vital role in local transportation.

This specific role is why the other options do not accurately represent the function of County Route signs. State highways, interstate routes, and emergency routes have distinct identification markers that serve different traffic management purposes.