Traffic Operations and Management

Feasibility Study of Advanced Technology HOV Systems: Volume 3: Benefit Implications of Alternative Policies for Including HOV Lanes in Route Guidance Networks

Chira-Chavala, T.
Lin, W. H.
1992

This study investigates issues concerning the implementation and impacts of lateral guidance/control systems and the phased implementation of these systems in exclusive-access High Occupancy Vehicle (HOV) lanes. The study is divided into 5 volumes. The objectives of each volume are as follows: Vol. 1: identify strategies for early deployment of longitudinal control technologies on the highway, and to evaluate potential impacts of these strategies on traffic operation, highway capacity, and traffic accidents. Vol. 2A: assess the feasibility of early deployment of Roadway Powered Electric...

Exploration of Driver Route Choice with Advanced Traveler Information Using Neural Network Concepts

Yang, Hai
Kitamura, Ryuichi
Jovanis, Paul P.
Vaughn, Kenneth M.
Abdel-aty, Mohammed A.
Reddy, Prasuna Dvg
1993

A model of drivers' route choice behavior under advanced traveler information systems (ATIS) is developed based on data collected from learning experiments using interactive computer simulation. A neural network model is used as a convenient modeling technique in the analysis. Results indicated that most subjects made route choices based mainly on their recent experiences. Results also demonstrated that route choice behavior is related to the personal characteristics as well as the characteristics of the respective routes. Travel experiences had less effect on route choice and the results...

Experimental Results with Moving Bottlenecks

Munoz, Juan Carlos
Daganzo, Carlos F.
2000

In this paper, the author present field observations and a new theory regarding moving bottlenecks on freeways. The observations focus on the occurrence of a steadily moving bottleneck on the I-880 freeway in Oakland, California, which was identified and characterized from loop detector data, including the behavior of the traffic stream around it. Oblique plots were used to reveal the location in time and space of the moving bottleneck's appearance including its trajectory over the freeway section. A set of controlled floating-vehicle experiments are described which involved the...

Evaluation of Mixed Automated/Manual Traffic

Ioannou, Petros
1998

The advance in research and development will make the deployment of automated vehicles a reality in the near future. The principal question is whether these technologies will lead to any benefits in terms of safety, capacity and traffic flow characteristics as they penetrate the current transportation system. Another aspect is how to exploit these technologies in order to achieve benefits without adversely affecting the efficiency of the current transportation system and the drivers who cannot afford them. The penetration of automated vehicles into the existing transportation system will...

Evaluation Framework for Commercial Vehicle Responses to Congestion Pricing

Wachs, Martin
Kawamura, Kazuya
1997

This report presents a short-run framework for analyzing the impacts of congestion pricing on commercial vehicles. The framework is based on microeconomics principles and past theoretical studies of congestion pricing. The relationship between value of time and the welfare gain/loss induced by using congestion pricing is identified. The social cost function and empirical demand and supply functions are also discussed.

Estimating ATIS Benefits for the Smart Corridor

Sengupta, Raja
Hongola, Bruce
1998

This report studies the effects of Advanced Traveler Information Systems (ATIS) on traffic congestion in the Smart Corridor of the Santa Monica Freeway. Simulation modeling is used to estimate the potential travel time savings to divert traffic from the Smart Corridor to arterial roads when incidents occur. The study attempts to establish relationships between traffic management variables, such as incident detection time, incident duration, capacity reduction, percentage of traffic diversion, and duration of traffic diversion.

Enhancements to a Simulation Framework for Analyzing Urban Traffic Networks with ATIS/ATMS

Jayakrishnan, R.
Rathi, U.
Rindt, C.
Vaideeshwaran, G.
1996

This report focuses on the DYNASMART simulation program presents a model that is capable of simulating large urban networks under various Advanced Traffic Management Systems (ATMS) and Advanced Traveler Information Systems (ATIS) strategies. It includes modules for driver responses to information and for capturing the dynamics of the network paths. The research also included the simulation study of a network in Orange County, California, where the benefits from candidate ATIS and ATMS strategies were evaluated. The DYNASMART model has evolved into a flexible tool that can be applied to...

Ecological Velocity Planning Through Signalized Intersections: A Deep Reinforcement Learning Approach

Pozzi, Andrea
Bae, Sangjae
Choi, Yongkeun
Borrelli, Francesco
Raimondo, Davide M.
Moura, Scott
2020

The use of infrastructure-to-vehicle communication technologies can enable improved energy efficient autonomous driving. Traditional ecological velocity planning methods have high computational burden, particularly when plug-in hybrid electric vehicles are considered. Consequently, in order to retrieve an optimal velocity profile in real time, it is necessary to rely on significant approximations.In this paper, the aforementioned issue is addressed by exploiting deep reinforcement learning in order to "learn" an eco-driving velocity planner for a plug-in hybrid electric vehicle within a...

Dual Influences on Vehicle Speed in Special-Use Lanes and Critique of US Regulation

Jang, Kitae
Cassidy, Michael J.
2012

We verify that slow speeds in a special-use lane, such as a carpool or bus lane, can be due to both, high demand for that lane and slow speeds in the adjacent regular-use lane. These dual influences are confirmed from months of data collected from all freeway carpool facilities in the San Francisco Bay Area. Additional data indicate that both influences hold: for other types of special-use lanes, including bus lanes; and for other parts of the world. The findings do not bode well for a new US regulation stipulating that most classes of Low-Emitting Vehicles, or LEVs, are to vacate slow-...

Development of Vehicle Simulation Capability

Stoner, James W.
Evans, Douglas F.
Mcgehee, Daniel
1997

This report summarizes work on developing simulation databasing tools and procedures to support driving human factors experiments. The simulator requirements are specified, and a complete description of the resulting Iowa Driving Simulation facility are provided. The specification and description of the visual features of the ORCHIDS data base illustrate the capabilities generated. Subsystems necessary to support simulation are described. Experimental design procedures are outlined. An example scenario illustrates the potential for applying driving simulation as a research tool to examine...