Research Projects

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Research Projects

STATUS: In Progress YEAR: 2019 TOPIC AREA: Sustainability, energy, and health Transportation planning, policy, and finance CENTER: PSR

Estimating the Impacts of Automatic Emergency Braking (AEB) Technology on Traffic Energy and Emissions

Project Summary

Project number: PSR-19-26a
Funding source: US DOT
Contract number: 69A3551747109
Funding amount: $99,995
Start and end dates: January 15, 2020 to January 14, 2021

Project Description

As one of the key advances in vehicle safety, Automatic Emergency Braking (AEB) has been introduced in the U.S. approximately a decade ago and the number of vehicles equipped with this technology has increased significantly. There has been only a few number of studies indicating that this technology is capable of reducing the number and/or the severity of relevant crashes, and how this has helped reduce the number of traffic fatalities. However, most of these studies have evaluated this technology at the individual vehicle level. Very few have attempted to quantify its effectiveness on the traffic system as a whole, especially on the impacts of energy consumption and tailpipe emissions. To address this gap, the research team proposes herein to evaluate the impacts of AEB technology from the traffic operation perspective. This research will: 1) build a structured database based on the real-world traffic state measurements, traffic accident records (focusing on those involved with light-duty personal vehicles), roadway geometry, and weather information (if available); 2) review existing studies related to AEB technology to identify the relationship between the implementation of AEB and the potential reduction of relevant crashes; 3) develop a statistical model that can quantify the environmental impacts caused by these crashes that could be addressed by AEB; and 4) perform a case study to estimate AEBinduced effectiveness on traffic energy consumption and pollutant emissions under different market penetration rates. The research results are expected to: 1) better understand the impacts of AEB on mitigating crash-induced environmental impacts; 2) help improve the transportation system's resilience by leveraging advanced safety-oriented vehicle technology; and 3) inform the policy makers of the potentials of AEB application, which may help approach some regulatory goal related to environment.


Guoyuan Wu
Assistant Research Engineer
Department of Electrical and Computer Engineering
Riverside, CA 92521
United States
[email protected]


Matthew Barth
Director, Bourns College of Engineering - Center for Environmental Research & Technology
1084 Columbia Avenue
Riverside, CA 92507
United States
[email protected]