Transportation projects are often implemented in phases, and the total project duration can span years. Optimization of the sequence in which transportation projects are implemented can decrease the severity of disruptions caused by construction, reduce the total cost of projects, and increase the present value of the benefits of the project. This paper presents a method for optimizing the sequence and location of dedicated bus lane implementations. The proposed method is based on a bi-level optimization framework. The lower level simulates the traffic using a link transmission model to evaluate car and bus delays, while the upper level optimizes the locations of bus lanes and/or the implementation sequence of a given bus lane configuration. If the budget or other resource constraints are binding, the optimized sequence uniquely determines the optimal schedule. The solution method is evaluated for a test network, and an analysis of sensitivity to different demand patterns and different bus lane configurations is conducted. First, the optimized locations for bus lane implementation are determined for an illustrative test network. Results suggest that, when considering the implementation sequence for the optimized set of bus lane locations, the sequence of implementation does not yield significant benefits. However, if bus lanes are implemented on every possible link, the results suggest that prioritizing the implementation of bus lanes on peripheral links would reduce the total cost the most. These locations coincide with the set of optimized locations for bus lane implementation. Further tests considering non-uniform demand patterns also confirm these findings.

运输项目通常分阶段实施，项目总工期可能长达数年。优化运输项目的执行顺序可以降低施工造成的破坏的严重性，降低项目的总成本，并增加项目收益的现值。本文提出了一种用于优化专用公交专用道实施方案的顺序和位置的方法。所提出的方法基于双层优化框架。下层使用链路传输模型来模拟交通，以评估汽车和公交车的延误，而上层则优化公交车道的位置和/或给定公交车道配置的实施顺序。如果预算或其他资源约束具有约束力，优化顺序唯一地确定了最佳计划。针对测试网络对解决方案方法进行了评估，并对不同需求模式和不同公交专用道配置的敏感性进行了分析。首先，确定用于示例性测试网络的公交专用道实施的最佳位置。结果表明，当考虑优化公交专用道位置集的实施顺序时，实施顺序不会产生明显的好处。但是，如果在每个可能的链路上都实现了公交专用道，则结果表明，优先考虑在外围链路上实施公交专用道将最大程度地降低总成本。这些位置与用于公交专用道实施的一组优化位置相吻合。