Intelligent Transportation Systems

A Conceptual Simulation Framework for Mobile Radio Communications: A Flexilevel Approach

Silvester, John A.
1997

Mobile radio communications systems are attracting more and more attention since they provide a means for users on the move to exchange information with other stationary or mobile stations. The capability of communication on the move can support many services and create lots of applications. For example, in the future Intelligent Vehicles Highway Systems (NHS), mobile communication technologies have enabled two important subsystems, namely Advanced Traffic Management and Information Systems (ATMIS) and Automatic Vehicular Control Systems (AVCS). The purpose of this research is to develop a...

Inter-technology Effects in Intelligent Transportation Systems

Levinson, David M.
Kanchi, Seshasai
Gillen, David
2002

This project examines the expected benefits of varying combinations of ITS applications: Freeway Service Patrol, Changeable Message Signs, and Ramp Metering. The research analyzes the simulated results of a stylized network in a microscopic traffic simulator. The traffic network includes parallel roadways, ramp meters and changeable message signs.We have tested these technologies in various combinations. We measure effectiveness and define a measure of inter-technology economies.In brief, it is found that additional technologies are sub-additive, and more benefits come from each technology...

Experimental Results of Fuzzy Logic Control for Lateral Vehicle Guidance

Hessburg, Thomas
Peng, Hei
Zhang, Wei-bin
Arai, Alan
Tomizuka, Masayoshi
1994

A Fuzzy logic controller (FLC) is designed and implemented in real time on a Toyota Celica test vehicle to achieve control of the lateral motion of the vehicle. The structure of the FLC is modularized as a feedback, preview, and gain scheduling rule base. The parameters of the FLC are tuned manually using information from characteristics of human driving operation and an existing controller. The fuzzy logic control strategies are implemented on the test vehicle, automatically following a multiple curved track using discrete magnetic markers as a lateral error reference system. The test...

Vehicle Navigation and Route Guidance Technologies: Push and Pull Factors Assessment

Ygnace, Jean-luc
Lavallee, Paul
Al-Deek, Haitham M.
1990

This study focusses on the development of navigation and route guidance technologies with an emphasis on existing systems, industrial strategies, market approach and human factors considerations. By considering the different situations in the US, Europe, and Japan the report analyzes the conditions under which one reasonably could assume a wide spread of these technologies with social and individual benefits.

Cities as Complex Systems—Collection Overview

Rybski, Diego
González, Marta C.
2022

This collection provides a contemporary excerpt of “Cities as complex systems”. The contributions have been submitted between April and October 2020. We briefly discuss example papers addressing the themes “urban scaling”, “urban mobility”, “flows in cities”, “spatial analysis”, “information technology and cities”, and “cities in time”. After motivating the intersection of cities and complexity, we provide an introduction and additional thoughts on urban scaling.

Street Context of Various Demographic Groups in their Daily Mobility

Salgado, Ariel
Li, Weixin
Alhasoun, Fahad
Caridi, Inés
Gonzalez, Marta
2021

We present an urban science framework to characterize phone users’ exposure to different street context types based on network science, geographical information systems (GIS), daily individual trajectories, and street imagery. We consider street context as the inferred usage of the street, based on its buildings and construction, categorized in nine possible labels. The labels define whether the street is residential, commercial or downtown, throughway or not, and other special categories. We apply the analysis to the City of Boston, considering daily trajectories synthetically generated...

Strategizing Equitable Transit Evacuations: A Data-driven Reinforcement Learning Approach

Tang, Fang
Wang, Han
Delle Monache, Maria Laura
2025

As natural disasters become increasingly frequent, the need for efficient and equitable evacuation planning has become more critical. This paper proposes a data-driven, reinforcement learning (RL)-based framework to optimize public transit operations for bus-based evacuations in transportation networks with an emphasis on improving both efficiency and equity. We model the evacuation problem as a Markov Decision Process (MDP) solved by RL, using real-time transit data from General Transit Feed Specification (GTFS) and transportation networks extracted from OpenStreetMap (OSM). The RL agent...

Human-In-The-Loop Classification of Adaptive Cruise Control at a Freeway Scale

Wang, Xia
Nice, Matthew
Bunting, Matt
Wu, Fangyu
Monache, Maria Laura Delle
Lee, Jonathan W.
Piccoli, Benedetto
Seibold, Benjamin
Bayen, Alexandre M.
Work, Daniel B.
Sprinkle, Jonathan
2025

The goal of this paper is to estimate whether a human or Adaptive Cruise Control (ACC) is managing a vehicle's speed control, based on observations by external sensors. The driving characteristics of individual vehicles---whether human-driven or ACC-controlled---play a crucial role in shaping overall traffic flow. To enable advanced traffic control strategies tailored to specific vehicle behaviors, this paper introduces a time-series deep learning classifier that leverages multiple models, including One-Dimensional Convolutional Neural Networks (1D-CNN), Recurrent Neural Networks (RNN),...

Improving Transit Performance with Advanced Public Transportation System Technologies

Hansen, Mark
Qureshi, Mohammad
Rydewski, Daniel
1994

This report identifies opportunities to improve transit performance using Advanced Public Transportation System (APTS) Technologies, assesses transit operator viewpoints on and experiences with APTS technologies, and proposes how current adoption and utilization practices might be improved so that these technologies are used in a more efficient and effective manner.The research consisted of three main phases. First, we identified APTS technologies and developed a framework for assessing their potential value in improving transit system performance. We considered three types of APTS...

Intelligent Transportation Systems

Shaheen, Susan, PhD
Finson, Rachel
2013

Intelligent transportation systems (ITS) represent a group of technologies that can improve transportation system management and public transit, as well as individual decisions surrounding many aspects of travel. ITS technologies include state-of-the art wireless, electronic, and automated technologies with a goal to improve surface transportation safety, efficiency, and convenience. Reducing energy consumption, while not a primary goal for ITS, is a demonstrated ITS benefit in certain circumstances. This paper reviews and summarizes key energy benefits associated with a variety of ITS...