Comment by micromacrofoot

That's rubbish, it's provable mathematically that given any speed limit it's possible to avoid an overlapping "dilemma zone" that requires speeding up

(v²) / (2a) ≤ (v × t_y) + L

v = vehicle speed (meters per second)

a = comfortable deceleration rate (meters per second squared)

t_y = yellow light duration (seconds)

L = length of the intersection (meters)

You can calculate the minimum yellow time for this using t_y ≥ (v / 2a) - (L / v)

This is rudimentary and doesn't account for reaction time, but a simple buffer would suffice.

The failure is largely in poor planning and poor human behavior.