Energy

Mobility and Energy Consumption Impacts of Cooperative Adaptive Cruise Control Vehicle Strings on Freeway Corridors

Liu, Hao
Lu, Xiao-Yun
Shladover, Steven E.
2020

Cooperative adaptive cruise control (CACC) vehicle string operations have the potential to improve significantly the mobility and energy consumption performance of congested freeway corridors. This study examines the impact of CACC string operations on vehicle speed and fuel economy on the 13-mi SR-99 corridor, near Sacramento, CA. It extends the existing body of knowledge by performing a multi-scenario simulation analysis of the freeway corridor. A simulation study evaluated the performance of the corridor under various CACC market penetration scenarios and traffic demand inputs. The CACC...

Energy Efficient Nonlinear Microscopic Dynamical Model for Autonomous and Electric Vehicles

Yeo, Yuneil
Lee, Jaewoong
Moura, Scott
Monache, Maria Laura Delle
2025

This article proposes a nonlinear microscopic dynamical model for autonomous electric vehicles (A-EVs) that considers battery energy efficiency in the car-following dynamics. The model builds upon the Optimal Velocity Model (OVM), with the control term based on the battery dynamics to enable thermally optimal and energy-efficient driving. We rigorously prove that the proposed model achieves lower energy consumption compared to the Optimal Velocity Follow-the-Leader (OVFL) model. Through numerical simulations, we validate the analytical results on the energy efficiency. We additionally...

An Energy-Based Flight Planning System for Unmanned Traffic Management

Liu, Zhilong
Sengupta, Raja
2017

In this paper, we proposed an energy-based flight planning system for Unmanned Aircraft Systems (UAS) Traffic Management (UTM). Fuel consumption estimation at the flight planning stage is safety critical in general aviation, because energy-related failures are often life-threatening. However, conservative fuel estimation is not economical and environmentally friendly because carrying unnecessary fuel load burns a lot of extra fuel. The same reasoning holds in UTM. Aviation researchers are actively working on optimizing fuel loading, but such research is lacking in UTM. In this paper, we...

Connected & Autonomous Vehicles – Environmental Impacts – A review

Kopelias, Pantelis
Elissavet, Demiridi
Vogiatzis, Konstantinos
Skabardonis, Alexandros
Zafiropoulou, Vassiliki
2020

Over the last decades the vehicle industry has shown interest in integrating new technologies on vehicles’ design. Such technologies are used in autonomous, connected and electrical vehicles with the primary hope of improving road safety and the environmental impact of road traffic. Regarding the environmental impact, the transport sector has been considered responsible for Greenhouse Gas emissions for the past thirty years or more, and efforts have been made to reduce impacts of such emissions on the environment. The environmental noise is also associated with road traffic and its effects...

Attica Tollway Management in the Athens 2004 Olympic Games

Halkias, Bill
Papandreou, Konstantinos
Kopelias, Pantelis
Prevedouros, Panos D
Skabardonis, Alexander
ITS America
2005

Attica Tollway (Attiki Odos Motorway), the peripheral motorway of Athens metropolitan area, is the first road concession project in Greece. Attica Tollway provides safe and uninterrupted traffic flow conditions, saving more 270,000 person hours of delay per day with substantial savings in fuel consumption and air pollutant emissions. During the Athens 2004 Olympic Games, special traffic management plans were successfully implemented to ensure quick and safe access to the Olympic venues and to maintain a high level of service to all tollway users. The paper presents routine and emergency...

Sustainable Transportation Energy Pathways, (STEPs) [Project]

Skabardonis, Alexander
2007

Need to develop theory, tools, and methods that allow for self-consistent and transparent comparisons of promising alternative energy and vehicle pathways (hydrogen, biofuels, electricity, and fossil fuels). Also, to inform the public debate and to assist our public and private sponsors on sustainable transportation alternatives.

A Network Spatial Analysis Simulating Response Time to Calls for Service at Variable Staffing Levels

Clark, Callie
Dangwal, Chitra
Kato, Dylan
Gonzalez, Marta
2022

In light of recent events, there has been a surge in discussions of defunding police. On one hand, policy that reduces police presence aims to reduce frequency of police violence. On the other hand, downsizing the police force triggers concerns of public safety and police response time. In this work, we use spatial analysis to examine the impact a reduced police force may have on response time. Modeling the transportation system of Chicago as a network, we simulate the response of police officers from stations to incidents. We then use this simulation to calculate the impacts of resource...

How Does the Electricity Demand Profile Impact the Attractiveness of PV-Coupled Battery Systems Combining Applications?

Pena-Bello, Alejandro
Barbour, Edward
Gonzalez, Marta C.
Yilmaz, Selin
Patel, Martin K.
Parra, David
2020

Energy storage is a key solution to supply renewable electricity on demand and in particular batteries are becoming attractive for consumers who install PV panels. In order to minimize their electricity bill and keep the grid stable, batteries can combine applications. The daily match between PV supply and the electricity load profile is often considered as a determinant for the attractiveness of residential PV-coupled battery systems, however, the previous literature has so far mainly focused on the annual energy balance. In this paper, we analyze the techno-economic impact of adding a...

Multimicrogrid Load Balancing Through EV Charging Networks

Chen, Xi
Wang, Haihui
Wu, Fan
Wu, Yujie
González, Marta C.
Zhang, Junshan
2022

Energy demand and supply vary from area to area, where an unbalanced load may occur and endanger the system security constraints and cause significant differences in the locational marginal price (LMP) in the power system. With the increasing proportion of local renewable energy (RE) sources in microgrids that are connected to the power grid and the growing number of electric vehicle (EV) charging loads, the imbalance will be further magnified. In this article, we first model the EV charging network as a cyber–physical system (CPS) that is coupled with both the transportation networks and...

The Dark Side of the Earth: Benchmarking Lighting Access for All Cities on Earth and the CityNet dataset

Albert, Adrian
Strano, Emanuele
Kaur, Jasleen
Gonzalez, Marta
2021

In this paper, we present an analysis of urban form, defined as the spatial distribution of macroeconomic quantities that characterize a city such as population, built environmentBuilt environment, and energy useEnergy use. In particular, we develop a framework to study the question of “mismatch” between the spatial distribution of lighting levels observed in a city (which was previously shown to be a proxy for energy access and wealth levels) and that city’s population density and built area distribution. This allows us to rank cities globally by their ability to, intuitively, “match...