Guidepost (noun)

1. A post or marker indicating the direction of a path or route.
2. A sign or marker used to indicate direction or provide information to travelers or tourists.

Origin:

Guide + post, from the use of the post to guide or direct people on a path or route.

Examples:

1. The guidepost pointed the way to the trailhead.
2. He used the guidepost to orient himself in the unfamiliar city.
3. A guidepost is a post or marker that indicates the direction of a path or route.
4. Guideposts are commonly found on trails, roads and highways to indicate direction and provide information to travelers.
5. Guidepost can also be used figuratively to refer to any kind of sign or marker that indicates direction or provides information.