Buick RIVIERA 1993 Manual page 148

We're all familiar with traffic lights or stop lights. Often
green arrows are being used in the lights for improved
traffic control. On some multilane roads, green arrows
light up, indicating that traffic in one or more lanes can
move or make a turn. Green arrows don't mean "go no
matter what." You'll still need to proceed with caution,
yielding the right of way to pedestrians and sometimes
to other vehicles.
Some traffic lights also use red arrows to signify that
you must stop before turning on red.
REVERSIBLE
LANE 0.N
LANE
ROADWAY
MULTI-
time. A green arrow means
you
may
drive in
that lane.
Look for the signs posted to warn drivers what hours
and days these systems are in effect.
Pavement Markings
NO
PASSING
ZONE
I
I
Pavement markings add to traffic signs and signals.
They give information to drivers without taking
attention from the roadway. A solid yellow line on your
side of the road or lane means "don't cross."
I
I
I
Many city roads and expressways, and even bridges, use
reversible-lane traffic control during rush hours.
A red X
light above a lane means no driving in that lane at that