What are service roads and main roads?

[McAiden]

Service roads and main roads are introduced as follows: 1. Service roads: Service roads are roads that distribute traffic from expressways, located on one or both sides of the expressway, allowing for one-way or two-way traffic. Generally, these roads are narrower and help alleviate pressure on the main road. 2. Main roads: Vehicles traveling on main roads are referred to as main road vehicles. Main roads are exclusively for motor vehicles, while service roads accommodate mixed traffic of motor vehicles, non-motor vehicles, and pedestrians. Service roads are the lanes on either side of the main road, serving as auxiliary lanes for main road traffic; main road vehicles travel on the normal traffic lanes. Below are the significant differences between main roads and service roads: 1. Main roads are only for motor vehicles: Service roads accommodate mixed traffic of motor vehicles, non-motor vehicles, and pedestrians. 2. The speed limit on service roads must not exceed 60 km/h: The speed on main roads can be over 80 km/h. 3. Main road vehicles have priority, and service road vehicles must yield: Service roads are not just for pedestrians or non-motor vehicles; they connect many intersections. 4. Speed: The speed on main roads is generally 30-60 km/h.