Among them, there are mainly four icons representing the functions of the service area:

1. Refueling gun sign: the service area with this sign can provide refueling services, so it can be said that all service areas should include refueling facilities.

2. Knife and fork sign: This sign indicates that there is a restaurant in the service area, and drivers can stop to eat.

3. coffee cup sign: this sign indicates that there is a lounge in the service area, but whether the lounge is free or charged depends on the specific situation.

4. Wrench sign: This sign indicates that the service area has maintenance function, and the vehicle can be basically overhauled.

The color of the service area sign is green and white, and there will be corresponding icons on the sign to indicate what functions the service area provides. Generally speaking, the more functions the service area has, the higher its level will be.

Function of expressway Service Area:

(1) Comprehensive service building: a place for drivers and passengers to rest, relax and entertain, as far away from the highway as possible, and provide a quiet, comfortable and elegant rest environment for long-distance travelers.

(2) Toilet: It should be close to the comprehensive service building to facilitate the centralized use of service facilities, reduce the shuttle between passengers and drivers and improve safety factors.

(3) Parking lot: The parking lot in the service area occupies a large area, accounting for 35%-41% of the whole service area. Parking lot for vehicles.

(4) gas station: provide fuel and water service for vehicles. The location of gas stations in the service area can be divided into two types: exit type and entrance type. The entrance type mainly considers refueling before rest. Its advantage is that vehicles can easily see the refueling settings when entering the service area, which meets the needs of ordinary drivers.