Why Do American-Spec Cars Have Two Yellow Lights?

[LeChristian]

Because U.S. traffic regulations require all vehicles to have these two lights, which are not merely decorative additions. These are vehicle width marker lights, designed to help drivers of other vehicles gauge the width of the car ahead or behind. Many U.S. interstate highways lack street lighting, so these marker lights not only aid visibility but also enhance safety. Additional relevant details are as follows: 1. American-Spec Cars: These are vehicles manufactured in compliance with U.S. road safety regulations, primarily for the American market. Since China and Europe do not have such regulations, these two orange marker lights are rarely seen on European-spec or Chinese-spec cars. In fact, many domestic car models in China have phased out width marker lights in favor of daytime running lights, which serve a similar purpose. Daytime running lights are brighter, cannot be turned off, and thus offer superior safety. 2. Most Chinese Roads Have Street Lighting: Even rural roads in China are typically equipped with streetlights, so there is little need for width marker lights. For the Chinese market, this feature is considered an optional rather than essential configuration.