Driving At Low Speed - Volvo FM Handbook

When ACC is permitted to use the wheel brakes again,
the symbols to the right are shown:
How long time it takes until ACC permits the use of
the wheel brakes again depends among other things on
how much the driver uses the footbrake during the
time the ACC has reduced the brake capacity.
If the brake protection is activated at the same time as
the ACC brakes for a slower vehicle, the system will
warn the driver (compare with collision warning).
Thereafter the system temporarily goes over to
reduced ACC.

Driving at low speed

When driving at very low speeds, ACC is
automatically disengaged . The symbol to the right is
then shown. See chapter "Cruise control" for more
information.
E.g. this can occur when driving in a slow moving
queue.
Adaptive cruise control 203
When ACC is in the reduced
mode, the ACC has reduced
braking capacity.
Note!
Economic use of ACC on downhill
slopes behind slower vehicles
reduces the risk of the brake
protection being activated and that
ACC goes to reduced mode.
Caution!
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