accident
bike
crackdown
crime prevention
emergency
guard
image
japan
japanese people
lamp
light
lined
maintaining security
metropolitan police
motor cycle
motorcycle
patrol
peace
police
police motorcycle
police officers
polis
ranks
red
red lights
repression
rides
rotating lights
security
security guard
signal tower
siren
speeding ticket
the policeman
traffic
traffic accidents
traffic control
traffic riot police
traffic safety
training
twowheeled vehicles
vigilance
violation control
violation of
white