Roads/Highways

Credit-Based Congestion Pricing: Equilibrium Properties and Optimal Scheme Design

Jalota, Devansh
Lazarus, Jessica
Bayen, Alexandre
Pavone, Marco
2023

Credit-based congestion pricing (CBCP) has emerged as a mechanism to alleviate the social inequity concerns of road congestion pricing - a promising strategy for traffic congestion mitigation - by providing low-income users with travel credits to offset some of their toll payments. While CBCP offers immense potential for addressing inequity issues that hamper the practical viability of congestion pricing, the deployment of CBCP in practice is nascent, and the potential efficacy and optimal design of CBCP schemes have yet to be formalized. In this work, we study the design of CBCP schemes...

Integrating Multi-Source Data for Bi-Level Traffic Simulator Calibration: A Literature Review and Highway Case Study

Samaei, Maryam
Ameli, Mostafa
Davis, Jon F.
McQuade, Sean T.
Lee, Jonathan W.
Piccoli, Benedetto
Bayen, Alexandre M.
2024

Traffic simulation serves as a powerful tool for pre-evaluating policies and technologies. In this context, simulation-based Dynamic traffic assignment (DTA) models are capable of capturing traffic dynamics. They are well-known as critical tools in controlling and predicting traffic situations. The reliability of simulation results heavily depends on the calibration process. Most studies in the literature formulate and calibrate simulators based on a single source of collected data or multiple data sets with the same spatiotemporal characteristics. However, in practice, traffic data is...

Reduce Emissions and Improve Traffic Flow Through Collaborative Autonomy

Patire, Anthony D.
Dion, Francois
Bayen, Alexandre M.
2024

This report explores opportunities for employing autonomous driving technology to dampen stop-and-go waves on freeways. If successful, it could reduce fuel consumption and emissions. This technology was tested in an on-road experiment with 100 vehicles over one week. Public stakeholders were engaged to assess the planning effort and feasibility of taking the technology to the next level: a pilot involving 1000+ vehicles over several months. Considerations included the possible geographical boundaries, target fleets of vehicles, and suitable facilities such as bridges or managed lanes. Flow...

Design, Preparation, and Execution of the 100-AV Field Test for the CIRCLES Consortium: Methodology and Implementation of the Largest Mobile Traffic Control Experiment to Date

Ameli, Mostafa
McQuade, Sean T.
Lee, Jonathan W.
Bunting, Matthew
Nice, Matthew
Wang, Han
Barbour, William
Weightman, Ryan J.
Denaro, Christopher
Delorenzo, Ryan
Hornstein, Sharon
Davis, Jon F.
Timsit, Dan
Wagner, Riley
Xu, Ruotong
Mahmood, Malaika
Mahmood, Mikail
Monache, Maria Laura Delle
Seibold, Benjamin
Work, Daniel
Sprinkle, Jonathan M.
Piccoli, Benedetto
Bayen, Alexandre M.
2025

This article presents the comprehensive design, setup, execution, and evaluation of the MegaVanderTest (MVT) experiment conducted by the Congestion Impacts Reduction via CAV-in-the-Loop Lagrangian Energy Smoothing (CIRCLES) Consortium, which aimed to mitigate traffic congestion using partially autonomous vehicles (AVs) (see “Summary”). The experiment involved 100 vehicles on Nashville’s Interstate 24 (I-24) highway, utilizing various control algorithms to smooth stop-and-go traffic waves. The execution of the MVT experiment required a coordinated effort from multiple teams. This article...

CALSIG an Analysis and Design Procedure for Signalized Intersections

Cassidy, M. J.
May, A. D.
1988

Research Problem for the 1985 Highway Capacity Manual

Cassidy, M. J.
May, A. D.
1988

A Proposed Analytical Technique for the Design and Analysis of Major Freeway Weaving Sections

Cassidy, Michael James
1990

Weaving occurs when merging traffic streams entering a freeway from an on-ramp cross over diverging traffic streams exiting the freeway via a nearby off-ramp. The intense lane-changing activity which typically occurs in weaving areas can create significant operational problems. Thus, weaving sections often represent bottleneck locations in urban freeway systems. The prevalence of weaving areas on U.S. freeways warrants the need for analytical techniques which can reliably analyze and/or design these critical freeway components. However, previous research at the Institute of Transportation...

Evaluating Steady-State Assumption for Highway Queueing System

Son, Young Tae
Cassidy, Michael J.
Modanat, Samer M.
1995

Stochastic queueing methods are often applied to highway systems to estimate performance characteristics such as delay and queue length.

Unique Bivariate Relationships in Highway Traffic

Cassidy, Michael J.
1996

Decision-Making System for Freeway Incident Response Using Sequential Hypothesis Testing Methods

Madanat, Samer M.
Cassidy, Michael J.
Teng, Hua-Liang
Liu, Pen-Chi
1996

Recent research in advanced traffic management systems has emphasized incident detection and response to mitigate nonrecurring congestion. Existing incident response decision-making algorithms do not account for the expected losses associated with false alarms, undetected incidents, and delayed incident response. A freeway incident response decision-making system based on sequential hypothesis testing techniques is presented. The primary feature of this decision-making system is that it minimizes the sum of the expected losses associated with false response, nonresponse, and delayed...