alarm
attention
background
beep
blowing
board
car
caution
circle
danger
do
forbidden
honk
honking
horn
icon
illustration
information
isolated
keep
loud
music
no
noise
prohibited
prohibition
quiet
red
road
round
safe
safety
sign
signal
silence
sound
stop
street
symbol
traffic
transport
transportation
trumpet
urban
vehicle
volume
warning
white
zone