Why can't you make a U-turn on white dashed lines?

[SanHarper]

Because making a U-turn on white dashed lines can easily lead to traffic accidents. White dashed lines indicate pedestrian crossings, which are signs for pedestrians to pass through. Here is the relevant information: 1. White dashed lines: When marked on road sections, they are used to separate traffic flows in the same direction or serve as safe driving distance identification lines; when marked at intersections, they are used to guide vehicle movement. 2. Situations where U-turns are allowed: At locations with designated U-turn openings, drivers should turn on the left turn signal in advance and make the U-turn without affecting other normal traffic; at intersections with U-turn signals, ensure the U-turn signal is green and make the U-turn only within the designated lane; at intersections with U-turn signs, make the U-turn based on actual conditions without obstructing other vehicles or pedestrians, and at intersections without explicit prohibitions against U-turns or left turns.

[Walker]

After driving for so many years, I've seen quite a few drivers attempt to make U-turns at white dashed lines, only to run into trouble. White dashed lines are primarily used to separate lanes, meaning you can change lanes, but making a U-turn is a completely different matter. The reason is that U-turns require more space and time, easily blocking vehicles behind or pedestrians nearby, leading to rear-end collisions or crashes. For example, if you make a U-turn at a dashed line, an oncoming driver might not have enough time to brake, especially on urban streets where speeds are higher, posing significant safety risks. I recommend only performing U-turns where there are clear U-turn signs, arrows, or intersections—that way, it's both legal and safe. Remember, road safety isn't just about following rules; it's also about considering others. Develop the habit of checking road conditions before acting, and you can avoid many problems.

[JasmineAnn]

I have studied traffic regulations, and the original intention of white dashed lines is to allow safe lane changes, but it absolutely does not mean that U-turns are permitted. The key difference lies in the fact that traffic laws explicitly prohibit making U-turns at locations without designated markings, as this disrupts traffic flow and increases the likelihood of accidents. For example, when there are dashed lines in the middle of the road, a U-turn requires a large turning radius, potentially spanning multiple lanes, obstructing visibility, and leading to collisions or congestion. I once simulated such scenarios and found that on high-traffic roads, such U-turns often cause traffic jams. The correct procedure is to look for dedicated U-turn zones or intersections with turning arrows. Following these rules not only avoids tickets but also demonstrates responsible driving behavior for both yourself and others.

[MacGage]

Once, while driving my manual transmission car, I attempted a U-turn at a dashed line. Being a bold beginner at the time, I nearly got sideswiped by a truck behind me. Reflecting on it later, I realized that while white dashed lines allow lane changes, they don't permit U-turns because turning requires a wider angle and more space. Dashed line locations often lack sufficient visibility to anticipate vehicles from other directions, and the safety distance is inadequate. If you rush into a U-turn, you might miss motorcycles or pedestrians in blind spots, posing high risks. Now, as a more experienced driver, I only consider U-turns at clearly marked U-turn signs or signalized intersections, avoiding those heart-stopping moments. This makes for steadier driving and reduces the risk of vehicle damage.