中文摘要：

可变速度限制(VSL ) 的控制策略被开发在马路减少旅行时间周期性的瓶颈区域。建议控制策略特别地集中了于阻止能力落下并且增加分泌物流动。一个房间传播模型(CTM ) 被开发在交通操作上评估建议 VSL 控制策略的效果。结果证明全部的旅行时间被 25.5% 减少，延期被 56.1% 减少。平均旅行速度被 34.3% 增加，队列长度被 31.0% 减少。交通操作被建议 VSL 控制策略改进。在马路瓶颈的不同类型使用建议 VSL 控制策略的方法被考虑不同交通流动特征也讨论。VSL 控制策略是有效的为，这被结束合并瓶颈但是是不太有效的为分叉瓶颈。

英文摘要：

A control strategy of variable speed limits （VSL） was developed to reduce the travel time at freeway recurrent bottleneck areas. The proposed control strategy particularly focused on preventing the capacity drop and increasing the discharge flow. A cell transmission model （CTM） was developed to evaluate the effects of the proposed VSL control strategy on the traffic operations. The results show that the total travel time is reduced by 25.5% and the delay is reduced by 56.1%. The average travel speed is increased by 34.3% and the queue length is reduced by 31.0%. The traffic operation is improved by the proposed VSL control strategy. The way to use the proposed VSL control strategy in different types of freeway bottlenecks was also discussed by considering different traffic flow characteristics. It is concluded that the VSL control strategy is effective for merge bottlenecks but is less effective for diverge bottlenecks.