| 摘要 |
<p>A traffic lane control system for selectively partitioning a multi-lane roadway includes two transversely spaced collapsible, inverted V-section guard barriers (56, 58) each formed by two elongate panels (22, 24; 28, 30) having their adjacent sides hinged together (50, 44) and their outer longitudinal sides hinged (53, 48, 46, 51) to the respective adjacent roadway sections (32, 26, 24), one of said barriers being in raised divider position, while the other one is spread out flat and forms part of the roadway. The roadway section intermediate between the barriers (56, 58) is a panel (26) mounted for reciprocation tranversely to the roadway; shifting said roadway panel (26) by means of a horizontal hydraulic jack (64) located under the roadway causes the raised barrier to spread down flat and the other barrier to concurrently jack-knife up to divider position. @Vertical hydraulic jacks (62, 60) are provided below the barriers to initiate jack-knifing thereof.</p> |
