TomTom NAVIGATION SYSTEM Reference Manual page 100

Traffic light camera - this type of camera checks for vehicles breaking
traffic rules at traffic lights.
Average speed check - these types of cameras measure your average
speed between two points. You are warned at the start and end of the
average speed check area.
When you first start using your device, no warning sounds are played for these types of cameras:
Accident black spot
Ungated railway crossing
Bi-directional speed camera
Toll road camera
Restricted road camera
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