What does 'white low, yellow high, black suggestion' mean?

[AngelaAnn]

On the road, yellow suggests slowing down, 'high' indicates a highway ahead, white represents a ramp, black means stop, and 'low' refers to low-frequency honking. Driving precautions are as follows: 1. Prevent fatigue driving: Fatigue reduces a driver's judgment, slows reaction times, increases operational errors, leads to untimely or inaccurate gear shifts, and may even cause brief sleep episodes, resulting in loss of vehicle control. 2. Never drive under the influence of alcohol: Alcohol increases blood alcohol concentration, leading to central nervous system paralysis, reduced rationality and self-control, impaired vision, narrowed field of view, lack of concentration, and weakened balance, causing delayed responses and sluggish actions when operating brakes, acceleration, or clutch pedals. 3. The dangers of speeding: Speeding causes mental stress, consumes significant psychological and physical energy, reduces vision, narrows the field of view, and impairs judgment, directly affecting the driver's operational stability.

[McBrody]

I've been driving for twenty years, so I know a thing or two about this. 'White for low, yellow for high' refers to the color standards for car headlights: white light is used for low beams, which are what we commonly call dipped headlights—they illuminate the road close by without dazzling other drivers; yellow light is used for high beams, or main beams, which are very bright and can light up the road far ahead. This design is mainly for safety, as yellow light has better penetration in rain or fog, ensuring you can still see the road clearly. Some older cars still use yellow high beams, but most new cars now use white light. However, during maintenance, you should check that the bulb colors are correct—don’t modify the lights randomly, or you might get fined by the traffic police. In my opinion, having the lights properly adjusted makes nighttime driving much safer, so I recommend having the light range checked by a mechanic during regular maintenance.

[KinsleyRose]

As a car enthusiast, I'm particularly fascinated by lighting. The 'white for low beams, yellow for high beams' is an old tradition in automotive lighting. Low beams use standard white light that doesn't appear yellowish and affect visibility, while high beams traditionally used yellow light to improve vision in bad weather. However, modern LED lights have switched to white light for better performance and energy efficiency. Just to add, don't randomly change light colors - regulations require low beams to be below 4300K color temperature to avoid glare, and excessive yellowness may violate rules. After years of driving, I've found that proper light alignment directly affects safety distance. I usually check bulbs and headlight height every six months to ensure clear visibility of obstacles ahead even in rainy conditions.

[SanAllie]

I just bought a car not long ago and had to look it up to understand the term. 'White for low beams, yellow for high beams' refers to car headlights: the low beam position uses white light, mainly illuminating the area close in front of the car; the high beam position uses yellow light, which provides clearer visibility at longer distances. The principle is that yellow light has a shorter wavelength and doesn’t scatter as much in foggy conditions. When driving, it’s important to get into the habit of switching back to low beam mode in clear weather to avoid dazzling others. Don’t slack on regular maintenance—check if the bulbs are yellowing or discolored and replace them promptly, as small oversights can lead to big dangers. I think it’s best for new drivers to read the owner’s manual thoroughly and avoid tampering with the light settings.