Buick 1993 Roadmaster Owner's Manual page 158

I
A
TRIANGULAR sign
also is
used
.on
two-lane:
roads
to:
indicate a NO
PASSING ZONE. This
s i p
will
be
QII
the left
&de
of
thegmadway.
.??
. f '
ONLY
J J
L - J
L - )
KEEP
LEFT
OR
RIGHT- TURN
RIOHT THROUGH
ONLY
RECTANGULAR
(square .or oblong) signs show :speed
limits, parking regtllaticjnfi, give directions, and .such
'
information as distances- to cities.
Symbols on .Road Signs
r
There are many international road signs in use today.