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Why traffic-light yellow phases are so carefully timed

HERE’S THE INTERESTING PART

The duration of a yellow light is calculated using the dilemma zone equation. If it is a fraction of a second too short, rear-end collisions skyrocket. It is a fragile mathematical balance between moving traffic and preventing fatal crashes.

From the Stacky collection1 min read
Why traffic-light yellow phases are so carefully timed
STACKY / Transport
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