An Approach to Assessing Freeway Lane Management Hot Spots

論文發表人: 鍾智林 (加州大學爾灣分校土木所博士班)

 

http://www.trb.org/meeting/2009/default.asp

 

本論文針對高乘載/收費車道與一般車道的競合關係，探討如何將車道剩餘容量即時且正確地供不同車道使用。高乘載/收費車道與一般車道可歸納成三種互動關係，包括『維持現況』、『需車道管理』、『超出車道管理範圍』。當兩類車道其中之一產生擁擠，而另一類尚有剩餘容量時，即產生車道管理熱點。本研究於24英里長加州高速公路案例中，以定性及非定性方法辨識出四處主要與三處次要車道管理熱點，四處主要熱點占研究路段時空集合的8.4%。本研究方法亦可準確預測車道管理熱點。文末提出車道管理熱點之因應策略並概估其成效。本方法尤適於部分進出管制之高乘載/收費車道。

 

This paper focuses on the tradeoff relationship between HOV/HOT lanes and general-purpose (GP) lanes that compete for limited road space. The basic idea is about sharing the excess lane capacity with each other on a timely and accurate basis. Potential conditions between these two types of lanes are categorized as "do nothing", "lane management", and "more than lane management". The "lane management" condition recognizes the extent and duration of a hot spot defined as low-utilized HOV/HOT lanes with congested general-purpose lanes, or vise versa. Four major and three minor lane management hot spots are deterministically and stochastically captured along a 24-mile freeway stretch in California. The major ones account for 8.3 percent of the total time-space set. The approach can also be applied to predict upcoming hot spots and acquires satisfying accuracy. Finally, strategies are proposed to prevent the hot spots and the effects of lane management are briefly estimated. The application of this approach is especially useful for HOV/HOT lanes of limited access points that prohibit vehicles of arbitrary shift between HOV/HOT and GP lanes.