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traffic lights - Coggle Diagram
traffic lights
components
inputs
cost
output function
aesthetics
safety
size
environment
lights
different colours
easily seen
black body to contrast with light
makes sure it is visible for people driving
tall enough for people to see it easily
not too expensive because lots are needed
make the colors visible
makes sure people can see it clearly
use different colour eg. red yellow green so that people understand when to go and when to not go
make sure drivers can see it in the night so they don't crash
make lots so that its safe for anywhere you go
affordable for poor countries
dark colour so it will be easy to see in the dark
not too expensive
black outline
reflector