
Lane changes are allowed with dashed lines. Only the side with the dashed line can cross into the lane with the solid line, and the lane change must be completed within the dashed section. There is another type of line called longitudinal deceleration lines, which are commonly seen on overpasses, toll stations, and other places. Longitudinal deceleration lines also consist of one dashed and one solid line.

















Back when I was learning to drive, I specifically studied this type of road marking. With double yellow lines where one side is solid and the other is broken, your driving position is crucial. If the broken line is on your side of the lane, you can completely move into the opposite lane to overtake or turn. But if your side has the solid line, you must never cross it—crossing the line is a violation. For example, when overtaking a tractor on a country road, the side with the broken line allows you to borrow the opposite lane to pass, but straying onto the solid line side could lead to a head-on collision with oncoming traffic. Never underestimate these lines—they clearly assign right-of-way control, with the solid line serving as a strict warning against crossing. Be extra cautious at night or during heavy rain when the markings become nearly invisible. In such conditions, it’s better to drive slower than to risk unsafe overtaking.

Over the years of driving long-haul trucks, I've often seen such road markings on national highways. Simply put, it depends on which side you're driving: vehicles on the side with dashed lines can cross the yellow line to change lanes or overtake, while those on the side with solid lines must stay strictly in their own lane. This design is particularly reasonable—like on winding mountain roads between two peaks, the outer side near the cliff uses solid lines while the safer inner side uses dashed lines, allowing drivers to judge overtaking opportunities themselves. Once while driving overnight on National Highway 318, I encountered a slow-moving vehicle ahead but dared not overtake on the solid line side. I waited until dashed lines appeared to safely pass. Remember, solid lines are like walls—hitting them means more than just penalty points; if a truck comes barreling from the opposite direction, it could be catastrophic.

Last week, the driving instructor just taught me this. When there's a double yellow line with one solid and one dashed, vehicles on the dashed side can cross the line, but the solid side must stay in the lane without crossing. For example, if your side is dashed, you can make U-turns or overtake; if it's solid and you force your way through, the camera will catch you, costing you 3 points and 200 yuan. During practice, I almost turned on the solid side, and the instructor immediately hit the auxiliary brake and yelled at me: 'Can't you see the solid line is like a wall?' This kind of marking often appears on two-way two-lane roads, like the section near our town's market. During morning rush hour, electric bikes dart around chaotically, and if it weren't for the solid line, accidents would have happened long ago.

I've been commuting by car for five years and encounter this kind of road condition every day. The core principle is to look at the side where your vehicle is: the dotted line side allows lane crossing for overtaking, while the solid line side should be treated as non-existent—just drive steadily. This design is actually quite user-friendly. For example, on the three-kilometer straight road in front of our company, the east side has many residential exits, so solid lines are used to prevent random turns, while the west side has green belts for safety, so dotted lines are set for convenient U-turns. The most dangerous scenario is on rainy days when the markings' reflectivity is poor and hard to see. In such cases, I'd rather drive an extra kilometer to find a dotted line for a U-turn. Never imitate some experienced drivers who force their way on the solid line side—last time, I witnessed two cars scraping each other and blocking the entire street. Remember: dotted lines are opportunities, solid lines are bottom lines.

This exact question appeared in the subject four exam two years ago. When encountering double yellow lines (one solid, one dashed) while driving, the key is which side your wheels are on. If you're on the dashed line side in your own lane, overtaking or U-turns are permitted. But if you're on the solid line side, you can't even turn the steering wheel half a centimeter toward the dashed side. This rule has saved many lives. Like near the kindergarten on my street - during pickup hours, overtaking is strictly prohibited on the solid line side, while the dashed side allows temporary parking for parents. Once when dropping off my kid, I forgot to check the lines and almost turned into a side road from the solid line side. The taxi behind me honked so loud it hurt my ears, making me realize I nearly violated the rule. Developing the habit of checking road markings during daily driving is crucial - don't wait until you get a ticket to regret it.


