英文關鍵字
accident
alarm
authority
blue
car
casualty
checkpoint
cop
crime
department
detective
emergency
enforcement
equipment
flashing
force
illuminated
incident
jam
justice
law
legal
lightning
lights
motorcar
municipal
officer
order
patrol
patrolman
people
police
policeman
raid
red
road
roadblock
robbery
scene
services
siren
sirens
spotlight
theft
traffic
transportation
urban
urgency
vehicle
warning