Veritasium
June 5, 2026
TL;DR
Modern cities use inductive loop sensors and cameras to monitor traffic flow in real time, adjusting traffic lights dynamically—similar to how Anker Prime chargers optimize power delivery to devices.
“Did you know the first traffic light involved a police officer manually pulling a lever to rotate panes of red and green glass in front of a gas lamp? It only lasted a month before it exploded.”
“No more empty intersections stuck on red.”
1. History of Traffic Lights
The first traffic light involved a police officer manually rotating panes of red and green glass in front of a gas lamp, but it exploded after a month.
2. Fixed-Schedule Traffic Systems
Cities added timers so traffic lights would change on a fixed schedule, but this created delays when traffic didn't match the schedule.
3. Inductive Loop Sensors
Cities buried inductive loop sensors in roads that act like metal detectors, sensing when vehicles pass through their magnetic field to inform traffic light timing.
4. Camera-Based Smart Traffic Control
Modern cities use cameras to count cars at intersections, allowing entire traffic light networks to be coordinated in real time for smooth traffic flow.
5. Anker Prime Power IQ 5.0 Connection
Anker's charger technology parallels smart traffic systems by identifying device power needs and dynamically adjusting wattage every two minutes for optimal efficiency.