accident
active
beacon
control
danger
design element
direction
electric
electricity
equipment
forbidden
foto
front
guidance
highway
icon
illuminated
image
intersection
isolated
lamp
light
mesh
metallic
noticable
object
order
people
present
regulate
road
safety
shiny
sign
speed
start
stop
stoplight
sunny
symbol
technology
traffic
train
transportation
urban
warning
words
yellow