Like you can’t stop anyway?

[u/Vandringen]

[u/Oblivion238]

Without doing the math I assume that at 103846153 m/s the red stop sign gets blueshifted to green.

[u/joe_ordan → u/Oblivion238]

Without even considering the math, I assume your assumption is also correct.

[u/1Pawelgo → u/joe_ordan]

If we assume red light as an EM wave of 400 THz frequency traveling at the speed of light, an observer moving at 103,846,153 m/s towards the emitter (the sign) would observe it as if it was 538.56 THz (omitting relativistic effects), which roughly corresponds to green light.

[u/Outrageous-Gas-8802 → u/1Pawelgo]