Why Do American Cars Have Red Turn Signals? History and Reasons

Many drivers, when seeing an American car on the road, wonder: why are the rear turn signals red instead of amber, as on most European or Asian vehicles? This feature is not a designer’s whim but the result of a mix of history, economics, and U.S. regulations. To make your car look more stylish and attractive from the outside, you can use tuning accessories, a wide selection of which you can find in our product range.

Historical origins of red turn signals

Turn signals appeared on cars in the 1930s and became widespread after 1939, when the patent for this technology expired. Initially, rear lights were exclusively red (for brakes and tail lights), and the turn signals often used the same bulb. In the 1960s, Europe (under UNECE rules) officially established amber rear turn signals as mandatory. In contrast, in 1968 the U.S. Federal Standard FMVSS 108 allowed both red and amber colors for rear turn signals.

American manufacturers chose the familiar red — and since then, the tradition has hardly changed.

Main reasons why red turn signals remain popular in the U.S.

• Production cost savings — one red section instead of two (red + amber) is significantly cheaper to produce.
• Simpler design — combined lamps (brake + turn) reduce the number of parts, simplify wiring, and make troubleshooting easier.
• Design tradition — the classic “American” look of rear lights implies a solid red design, considered more aesthetically appealing.
• Lack of strict enforcement — although NHTSA studies show that amber turn signals reduce crash rates by 5–28% (depending on the scenario), U.S. regulators did not consider the difference critical enough to ban red lights.

Interesting facts

• In Europe and most countries worldwide, amber rear turn signals have been mandatory for over 50 years.
• Some brands (for example, Mazda or certain Hyundai models) use amber turn signals for export but make red ones for the U.S. market.

Thus, red turn signals are not just an “American quirk” but also an example of how economic and historical factors can outweigh even safety arguments.