Mobile Cameras; Built-In Cameras; Section Control Cameras - Clarion MAP670 Owner's Manual

4.9.1.2 Mobile cameras

Some cameras are operated from vehicles. The database contains some typical
places of these mobile cameras. They are not always operational at the given
location, and the speed limit is not specified for them. The warning is similar to fixed
cameras, but as there is no speed limit given, only the proximity is announced.
These cameras are displayed with the following symbol:

4.9.1.3 Built-in cameras

Some cameras are built in traffic lights. T hey work lik e fixed cameras, but they are
difficult to spot. The warning for proximit y and speeding is the same as for the fixed
cameras.
These cameras are displayed with the following symbol:

4.9.1.4 Section control cameras

These cameras work in pairs, and do not measure your current speed but your
a verage speed between the two cameras. Both will identify your car, and record the
exact time you pass them. The difference between the two points of time will be used
to calculate your average speed.
Clarion will warn you when you approach one of these cameras, but as you pass by,
the warning stays on, and y our average speed is measured until you reach another
camera of this type. If your average speed exceeds the speed limit between the two
cameras, you will receive the same special warning soun d as with the other camera
types.
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