
Vehicles driving on the auxiliary road are referred to as auxiliary road vehicles. Below is relevant information about auxiliary roads: 1. Definition: An auxiliary road is a road that distributes expressway traffic, located on one or both sides of the expressway, allowing for one-way or two-way traffic. Generally, these roads are narrower. 2. Function: When there is too much traffic on the main road, leading to high traffic pressure, some vehicles can first drive on the auxiliary road to alleviate the traffic pressure on the main road. 3. Speed limit: The speed on auxiliary roads must not exceed 60 kilometers per hour. 4. Permitted vehicles: Auxiliary roads allow mixed traffic of motor vehicles, non-motor vehicles, and pedestrians. 5. Classification: Depending on the need, auxiliary roads can be set up as intermittent auxiliary roads between two interchanges or as continuous auxiliary roads passing through interchanges.

To be honest, when I first started driving, I didn’t understand what an auxiliary road was either. It wasn’t until I got stuck in rush hour traffic a few times that I figured it out. Simply put, it’s the road that doesn’t take the main route, usually running parallel to large overpasses or main roads. For example, on Beijing’s Third Ring Road, the main road cars zoom at 80 mph, while the auxiliary road cars slowly crawl along the side lanes, often dealing with pedestrians suddenly darting out or parked delivery trucks. The most annoying part of driving on auxiliary roads is constantly watching for intersections—those e-bikes suddenly turning out from residential areas are the real bosses. Oh, and another feature of auxiliary roads is the abundance of traffic lights. Whenever my navigation warns me of an upcoming auxiliary road, I prepare to hit the brakes.

Last week, while taking my daughter to school via the service road, she asked why such a narrow road had so much traffic. I explained to her that it's like the express checkout lane in a supermarket—the main road is the fast lane for long-distance drivers in a hurry, while the service road is the slow lane serving nearby residential areas and shopping centers. Look at all the convenience stores, schools, and bus stops along the roadside; they all on the service road to connect them. There's also a rule for service road traffic: you have to wait for the right moment to merge onto the main road. I've seen many inexperienced drivers hesitate at the ramp and get honked at by cars behind them. Remember when I was learning to drive, the instructor always said there's a good reason for the 40 km/h speed limit on service roads—after all, you might encounter a food delivery rider going the wrong way at any moment.

Once, while driving to the new urban area, I got lost and relied entirely on the auxiliary road signs to find my way. Auxiliary roads are actually the capillaries of the urban transportation network, connecting residential areas and commercial streets—these capillary ends. For example, when you see a sign for a certain building on the main road, you'll likely need to turn onto an auxiliary road to reach it. Some experienced drivers prefer taking auxiliary roads as shortcuts, but you have to watch out for sudden bumps from manhole covers. During municipal , auxiliary roads are often occupied, making detours particularly troublesome. Recently, I found the auxiliary road prompts on Gaode Map very practical, as they give a voice reminder to change lanes 300 meters in advance.

I remember being rear-ended on a service road last year, and the traffic police mentioned that such accidents are particularly common. The biggest difference between service roads and main roads lies in their service targets: main roads serve cross-regional traffic, while service roads facilitate local access. Pay attention to the blue roadside signs—those with the letter 'G' indicate national main roads, while those with 'S' denote provincial service roads. Extra caution is needed when driving on service roads in rainy weather, as the tiles laid on non-motorized lanes become extremely slippery when wet. Once, I almost caused trouble when making a U-turn on a service road without noticing a bicycle behind me. Nowadays, many new energy vehicles come with driver assistance systems, but navigating the complex conditions of service roads still requires personal judgment.

At the last car enthusiasts' gathering, there was a debate about the definition of auxiliary roads. Actually, the traffic laws clearly state: auxiliary roads are parallel roads set up to alleviate pressure on the main roads. The most typical example is the road beneath Shanghai's Inner Ring Elevated Road—clearly in the same direction but with different speed limits. On auxiliary roads, you usually encounter more diverse road conditions: food delivery e-bikes, street vendors' tricycles, and even pedestrians walking their dogs. I've observed the auxiliary road designs in different cities—new urban areas plan them wide and straight, while old urban areas have winding ones. A special reminder for new drivers: when making a right turn at an auxiliary road intersection, don't just focus on the traffic coming from the left; there are often e-bikes running red lights in the blind spot on the right.


