PREVOST X3-45 VIP 2017, Owner'S Manual

Page: 49 / 212

Controls and Instruments 4-15
Once the audible warning is given, the driver
must increase the distance between the coach
and the vehicle ahead until the audible warning
stops or maneuver clear of the forward vehicle.
WARNING
Following Distance Alert is always active
whenever the coach is moving to a speed
greater than 37 mph (60 km/h), whether or not
ACB is turned on. Active interventions of ACB
to maintain safe following distance (throttle
reduction, engine brake/retarder application,
service
brakes application) are only
operational when the ACB is engaged with a
cruise speed set.
IMPACT ALERT
The Impact Alert warning is the most severe
warning issued by the
ACB system. This alert
indicates that the driver must take immediate
evasive action by applying more braking power
and/or steering clear of the vehicle ahead to
avoid a potential collision.
The Impact Alert is also applicable to stationary
metallic objects such as stopped or stalled
vehicles. This alert provides a warning given up
to 3.0 seconds before a potential collision with a
stationary metallic object in the coach’s lane of
travel. The driver can either slow down or
maneuver in an attempt to avoid the object. The
Impact Alert will only warn and will not actively
decelerate
or brake the coach when
approaching stationary objects.
WARNING
Impact Alerts are always operational when the
vehicle is running,
whether or not ACB is
turned on. Active interventions of ACB to
maintain safe following distance (throttle
reduction, engine brake/retarder application,
service
brakes application) are only
operational when the ACB is engaged with a
cruise speed set.
BRAKE OVERUSE WARNING
ACB provides a warning when the system is
intervening and using the service brakes
excessively. Overuse of the foundation brakes
can lead to the brakes overheating and a
potential loss of braking performance from brake
fade. For example, the use of ACB on downhill
runs may cause this alert to be activated. It is
recommended that ACB be disengaged on
downhill grades. The driver should use
appropriate gearing and brake techniques, and
not rely on ACB, on downhill grades.
If the driver does not respond to the Brake
Overuse Warning after a brief delay, the ACB
will switch off.