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traffic lights - Coggle Diagram
traffic lights
components
LEDs
buzzer
safety
it should work correctly
waterproof
output functions
all traffic lights in close area go red
time to cross
buzzing noise
environment
on a road
help people cross
size
draw peoples attention
Big
Easily seen from all directions
aesthectics
appearance
colour
appealing
clear
inputs
button
press
cost
inexpensive but focused on safety