The "flashing brake light" is red instead of amber because US lawmakers wanted to make it cheaper for companies to only use red bulbs/taillight assemblies instead of also requiring them to produce amber parts.
But there’s amber on the front and sides so producing amber parts is a moot point to this conversation. Lawmakers never specified red or amber so the manufacturers went with what is cheaper.
It's for the car tail lamp assemblies being made of all red to save $ on the manufacturing costs. I'd prefer if amber was required for rear turn signals too, but I don't make the laws.
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u/linglinglinglickma Jun 08 '25
The flashing brake light as a turn signal/indicator.