CHLANE(1) FSF CHLANE(1)
chlane - change current vehicle lane
chlane [options] OCTAL_LANE_NUMBER
chlane(1) is the GNU vehicle lane management utility. It
is a part of the car-utils package. Your kernel must have
been compiled with the -DANTARCTIC_TERROR_ON_THE_HIGHWAY
flag for this program to work properly.
The lane number argument to chlane controls which lane your
vehicle will be moved to. The far left lane on any road
is lane 0. Shoulders do not count as lanes. When driving
on an undivided highway, lane 0 will usually be travelling
in the opposite direction.
While the current version of the software allows it, a future
revision may forbid lane changes into oncoming traffic.
It is highly recommended that no code be written that relies
on the ability to chlane into oncoming traffic.
The chlane options are listed below. Due to differences
in the implementation of vehicles, not all options may
be available on your platform. Check with your system
administrator or an ASE certified auto mechanic for
Boolean options have a corresponding --no version. For
example, the --check-blind-spots behavior could be
disabled by the --no-check-blind-spots flag.
Causes the vehicle's blind spots to be scanned for occupying
objects before the lane change is attempted. This option is
on by default unless the --heavy-traffic option is specified.
Causes chlane to prompt user for confirmation before merging
into oncoming traffic. Off by default.
Changes some optimization assumptions for the case where
the roadway is heavily traveled.
Causes the vehicle to not attempt a lane change when, after
the change, there would be less than 3 feet separating the
vehicle from the vehicles in front and to the rear of it.
Causes the vehicle's turn signal to be flashed the specified
number of times before the lane change event. If no argument
is provided defaults to 3 flashes. This option is on
unless other vehicles are detected on the road.
Useful only for vehicles with large body configurations such
as buses and semi-trucks. This options causes the vehicle
to rapidly enter the specified lane, sweeping other vehicles
from the road in the process. On by default for Seattle
The --confirm-death option is presently a no-op.
The --signal-on-change option remains unimplemented
due to the extreme novelty of the idea and resistance
among standards bodies to change existing highway
October 22, 2000 Linux programmer's manual (1)