A turn indication system for a vehicle includes an indicating member
movable between a first position and a second position in response to the
actuation of a turn signal switch. A door-ajar indication system for a
vehicle includes an indicating member movable between a first position
and a second position in response to the actuation of a switch so as to
indicate an ajar condition of a door of the vehicle. A traffic
observation system for a vehicle includes a wave receiving member for
mounting to the vehicle such that the wave receiving member is oriented
along a line of sight from an object approaching the vehicle from a
lateral direction generally perpendicular to a path of motion of the
vehicle, permitting a driver of the vehicle to perceive the object via a
wave received by the wave receiving member from the object along the line
of sight.