Mazda 3 Quick Manual page 19

When Driving
Traffic Sign Recognition System (TSR)
NOTE
The Traffic Sign Recognition System (TSR) does not operate if there is a
malfunction in the Forward Sensing Camera (FSC).
Excessive Speed Warning
If the vehicle speed exceeds the speed limit sign displayed on the active driving
display, the warning sound is activated and the area around the speed limit sign
displayed on the active driving display flashes 3 times in amber, and if the vehicle
speed continues to exceed the displayed speed limit sign, the indication stops
flashing and remains on. Check the surrounding conditions and adjust the vehicle
speed to the legal speed using the appropriate operation such as depressing the
brake pedal.
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For details, refer to Section 4, "i-ACTIVSENSE".