allow
amber
blue
car
city
colours
communication
concept
control
crossing
crossroad
danger
day
direction
equipment
go
green
illuminated
information
intersection
lamp
light
modern
nobody
permission
permit
pole
post
red
regulate
road
safety
semaphore
sequence
sign
signal
sky
stop
stoplight
street
symbol
traffic
transport
transportation
urban
vehicle
warning
way