What is located off the highway in the direction indicated by the arrow?

The correct answer is that a rest area is located off the highway in the indicated direction. Rest areas are specifically designed to provide travelers with a safe and convenient place to stop, take a break, use restroom facilities, and often enjoy picnic areas. They are typically situated along highways to serve motorists, especially on long trips. This allows riders and drivers to rest and recuperate, helping to promote safer driving practices by reducing fatigue.

In contrast, a bus station caters primarily to public transportation passengers and is not typically found directly off highways in the same manner as rest areas. A litter barrel is a small, localized waste disposal container that would not be marked by signage directing motorists to a location. Lastly, playgrounds are generally situated in residential areas rather than on highways, aimed more at serving local communities rather than highway travelers. Therefore, identifying the rest area as the correct answer aligns with its designation and purpose in highway travel.