3d
abuse
alarm
alert
art
background
brake
caution
control
cut
danger
device
emergency
equipment
fire
handle
help
icon
illustration
isolated
lever
metal
metro
object
origami
paper
paperart
papercut
protection
pull
purple
railway
red
rescue
safe
safety
security
sign
stop
switch
system
technology
train
transport
transportation
vehicle
volumetric
wall
warning