High-Occupancy Vehicle (HOV) and High-Occupancy Toll (HOT) Lanes

Author(s):  
Roxana J. Javid ◽  
Jiani Xie ◽  
Lijiao Wang ◽  
Wenruifan Yang ◽  
Ramina Jahanbakhsh Javid ◽  
...  
Author(s):  
Thomas Light

This paper explores how alternative pricing and operating policies influence revenue generation, level of service, and travel time costs for high occupancy toll (HOT) lane facilities. A framework for modeling HOT lanes is applied to a hypothetical facility. The analysis suggests that the way in which tolls are set can have a non-trivial influence on competing measures of HOT lane performance. Other operating characteristics, such as the number of lanes designated as free and priced and whether carpools are allowed to ride free or must pay a toll to access the HOT lanes, are shown to significantly influence performance as well.


Transport ◽  
2014 ◽  
Vol 29 (3) ◽  
pp. 317-325 ◽  
Author(s):  
Kitae Jang ◽  
Myoung Kyun Song ◽  
Keechoo Choi ◽  
Dong-Kyu Kim

As a freeway operational management strategy, High-Occupancy Toll (HOT) lanes have been deployed to manage the demand for High-Occupancy Vehicle (HOV) lanes by adjusting the tolls. By doing so, the capacity of freeways with such lanes can be used more efficiently. Periodically, setting the right amount of toll in accordance with the time-varying demand is a key to successful operation of HOT lanes; however, this is often difficult because travellers have heterogeneous willingness to pay for the toll and traffic conditions vary as the demand changes due to the imposition of tolls. This paper proposed an algorithm to determine the optimal level of toll for minimizing the total delay collectively spent by both HOVs and low-occupancy vehicles. Based on real-world traffic and survey data obtained from Gyungbu expressway in South Korea, a case study is presented to verify the applicability of the developed algorithm. The results from the case study show that the proactive dynamic pricing scheme can use the underutilized capacity of HOT lane efficiently and, thereby, shorten total travel time by 22% and generate revenue of more than $8600. Some limitations and future research agendas are also discussed.


Author(s):  
Michael Janson ◽  
David Levinson

High occupancy/toll (HOT) lanes typically vary tolls charged to single occupant vehicles, with the toll increasing during congested periods. The toll is usually tied to time of day or to the density of vehicles in the HOT lane. The purpose of raising the toll with congestion is to discourage demand sufficiently to maintain travel speeds in the HOT lane. However, it has been demonstrated that the HOT toll may act as a signal of downstream congestion (in both general purpose (GP) and HOT lanes), causing an increase in demand for the HOT lane, at least at lower prices. This paper develops a model of lane choice to evaluate alternative HOT lane pricing strategies, including the use of GP density, to more accurately reflect the value of the HOT lane. In addition, the paper explores the potential effect these strategies would have on the HOT lane vehicle share through a partial equilibrium analysis. This analysis demonstrates the change in demand elasticity with price, showing the point at which drivers switch from a positive to negative elasticity.


Author(s):  
David Ungemah ◽  
Myron Swisher ◽  
C. Daniel Tighe

As managed lanes and high-occupancy toll (HOT) lanes gain popularity as a potential mobility measure, the question of how the public views these relatively new concepts is of vital importance. Concerned that a potential conversion of the North I-25 high-occupancy vehicle (HOV) facility in Denver, Colorado, to HOT lanes could be perceived as too controversial, the Colorado Department of Transportation (CDOT) sponsored market research and public outreach and assessment for evaluating the level of controversy. The messaging, methodology, activities, and findings from this effort may provide valuable information for communities that are considering HOT lanes as a component to their mobility challenges. This paper outlines the efforts conducted by CDOT's project team, including focus groups with commuters and business owners, stakeholder outreach to vested public officials and interest groups, conversations with the public in varying open houses, and a stated preference telephone survey. The conclusions from this effort indicate that ( a) support for HOT lanes is greater than it was a few years earlier, ( b) issues related to income and equity are not as pronounced as anticipated, ( c) public opinion can be favorably affected when individuals are informed on means of avoiding tolls by carpooling or riding the bus, and ( d) HOT lanes are viewed as an interim solution that is only a component of a regional multimodal transportation system. For practitioners hoping to extend support for HOT lanes to their facilities, the principal finding indicates that comarketing the HOT lane option with a means of avoiding a toll (through carpooling or riding the bus) may favorably affect public acceptance.


Author(s):  
Ahmed F. Abdelghany ◽  
Khaled F. Abdelghany ◽  
Hani S. Mahmassani ◽  
Pamela M. Murray

Application of a dynamic traffic assignment-simulation methodology to the analysis and evaluation of network performance under various schemes for the design and operation of high-occupancy toll (HOT) lanes is described. The DYNASMART traffic simulation-assignment model, which combines the ability to simulate traffic flow and to represent dynamic route choice behavior, is used to model the problem. Different dimensions for the design and operation of HOT lanes are considered in this study, including ( a) lane utilization in terms of adding a new lane or using an existing lane of the facility as a HOT lane; ( b) physical separation of the HOT lane in terms of access point frequency; ( c) access restriction based on vehicle occupancy; ( d) HOT lane pricing structure, which may be fixed or congestion dependent; and ( e) different demand levels with different percentages of high-occupancy vehicles (HOV). A set of experiments was designed to compare the performance of the HOT lanes and the total network under these different operating characteristics. A network in Texas that represents the south central part of the Fort Worth area is used in these experiments. The results were analyzed under each of these different operating characteristics, yielding useful insights for the design and evaluation of HOT lanes.


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