Speed harmonization reduced fuel consumption by 6.3 percent in addition to reducing HC, CO, NOx, and CO2 emissions.

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

Date Posted

Developing Eco-Adaptive Cruise Control Systems

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.


Using SPD-HARM as an Eco-Lanes application reduced fuel consumption by 6.3 percent, hydrocarbon emissions by 23.9 percent, carbon dioxide emissions by 26.1 percent, nitrogen oxide emissions by 17.2 percent, and carbon dioxide emissions by 4.4 percent.
Deployment Locations