ABSTRACT

In combination with challenging geometrical characteristics and environmental conditions, heavy truck traffic along interstate 80 (I-80) in Wyoming often creates operational and safety issues. One of the potentially effective countermeasures that can improve traffic conditions along vertical grade sections is the installation of climbing lanes. This paper presents an operational and safety-based benefit-cost analysis (BCA) for climbing lane installations along I-80 in Wyoming. Seven corridors with proposed climbing lanes were analyzed, and performance measures associated with these segments were collected to evaluate the operational and safety effectiveness. The BCA results indicate that the installation of climbing lanes has a significant potential to improve traffic performances for a 20-year planning horizon, with aggregated benefits significantly outperforming the corresponding costs. The benefit-cost ratio varies between 0.8 and 7.8 where the majority of incurred benefits, up to 98%, comes from safety improvements associated with the new climbing lanes.

摘要

结合具有挑战性的几何特征和环境条件，怀俄明州 80 号州际公路 (I-80) 沿线的重型卡车交通经常会产生运营和安全问题。可以改善沿垂直坡度路段交通状况的潜在有效对策之一是安装爬坡车道。本文介绍了怀俄明州 I-80 沿线攀爬车道安装的运营和基于安全的效益成本分析 (BCA)。分析了 7 条带有拟议攀爬车道的走廊，并收集了与这些路段相关的性能指标，以评估运营和安全有效性。BCA 结果表明，在 20 年的规划范围内，安装攀爬车道具有改善交通性能的巨大潜力，总收益显着优于相应成本。收益成本比在 0.8 和 7.8 之间变化，其中大部分产生的收益（高达 98%）来自与新攀爬道相关的安全改进。