Maserati GranTurismo Owner's Manual page 255

The BSA system notifies the driver of
vehicles or objects in the detection
zones by illuminating the BSA warning
light located in the outside mirrors in
addition to sounding an audible (chime)
alert and reducing the radio volume
(if the radio is on). Refer to "BSA and
RCP Setting" in this chapter for further
information.
The BSA system monitors the detection
zone from three different entry points
(side, rear, overtaking traffic) while
driving to see if an alert is necessary. The
BSA system will issue an alert whenever
a vehicle enters any one detection zone
as outlined below.
Speed Range of Use
Speed km/h (mph)
Minimum 10 (6)
Engaged/activated 10 (6)
Maximum 180 (112)
NOTE:
Performance is guaranteed up to a
maximum speed of 180 km/h (112 mph).
Entering from the Side
Vehicles that move into your adjacent
lanes from either side of the vehicle.
Entering from the Rear
The alert will turn on when the vehicles
that come up from behind your vehicle
on either side and enter the rear
detection zone with a relative speed of
more than 43 km/h (27 mph).
Overtaking Traffic
The figures show the vehicle
approaching (A) and passing (O) another
vehicle in the overtaking lane.
If you pass another vehicle slowly, the
vehicle remains in the blind spot for
Driving and Driver Assistance Systems
approximately 2 seconds, the BSA
warning light in the outside mirror will
illuminate after 1.5 seconds.
If the difference in speed between the
two vehicles is greater, the warning light
will not illuminate.
Other Cases
The BSA system is not designed to issue
an alert on stationary objects such as
guardrails, posts, walls, foliage heaps,
berms, etc. However, occasionally the
system may alert on such objects. This is
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