| 摘要 |
<p>A traffic control device comprises a base (14) which rotatably carries a sign (16). The sign (16) has two opposite sides respectively bearing 'STOP' and 'GO' indications. A motor on the base (14) is coupled to the sign (16) for rotating the latter. Control means in the base positions the sign (16) alternately in angular positions 180° apart in response to control signals issued from a remote handset (11). A traffic control system includes two such devices controlled by a common handset.</p> |
