Eco-cruise control application reduced fuel consumption by 27 percent on a section of I-81 in Virginia.

Two eco-driving applications developed and evaluated for reductions in fuel consumption and emissions.

January 2014
I-81; Roanoke; Virginia; United States; I-81; Blacksburg; Virginia; United States

Summary Information

The study demonstrates the feasibility of two eco-driving applications, aiming to reduce vehicle fuel consumption and greenhouse gas emissions. Specifically, the study develops an eco-drive system that combines eco-cruise control (ECC) logic with state-of-the-art car-following models and evaluates Eco-Lanes and speed harmonization (SPD-HARM) applications.


The eco-drive system makes use of topographic information, the spacing between the subject and lead vehicle, and a desired (or target) vehicle speed and distance headway as input variables. It was studied on a segment of I-81 between Roanoke and Blacksburg, Virginia.

The Eco-Lanes and SPD-HARM applications were evaluated using the INTEGRATION microscopic traffic simulation software.


The eco-drive system developed could significantly improve fuel efficiency while maintaining reasonable vehicle spacing. One of the test vehicles, a 2011 Toyota Camry, saw a 27 percent reduction in fuel consumption with an average vehicle spacing of 47 m on the study section of I-81 (between Roanoke and Blacksburg, Virginia). The study also found that vehicles not equipped with ECC could still benefit from ECC if they followed an ECC-equipped vehicle.

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Developing Eco-Adaptive Cruise Control Systems

Author: Rakha, Hesham and Kyoungho Ahn

Published By: U.S. Department of Transportation

Prepared by Virginia Tech for the USDOT

Source Date: January 2014

Other Reference Number: 14-06



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Typical Deployment Locations



eco-driving, eco-lanes, fuel consumption, connected eco-driving

Benefit ID: 2018-01226