Traffic-light-to-vehicle communication systems can help drivers avoid braking and accelerating maneuvers and reduce fuel consumption 8 to 22 percent.

Experience developing connected vehicle applications.

November 2010

Summary Information

This study used real-world inner-city road network data input into a simulation model to estimate the fuel saving benefits of implementing a traffic-light-to-vehicle communication (TLVC) system. Using short range wireless communications the system was designed to broadcast signal timing information to nearby vehicles enabling them to calculate approach speeds needed to hit green lights and communicate this information to drivers. The objective was to optimize travel speeds and avoid unnecessary braking and acceleration maneuvers.

Vehicle performance was calculated for single and multiple vehicle scenarios "with" and "without" TLVC systems. A microscopic simulation program (VISSIM) was used to represent vehicular traffic, communications from traffic lights to vehicles, and driver behavior subject to a speed-adaption. Impacts on fuel consumption were calculated using a passenger car and heavy duty emissions model (PHEM). The single vehicle scenario represented performance on a roadway segment between traffic lights spaced at approximately 700 meters. For scenarios with multiple vehicles the network represented an inner-city section of Karlsruhe, Germany with 15 signalized intersections.

The findings represented averages for all combinations of penetration rates for radio equipped vehicles, information distances between vehicles and traffic lights, and communication models.

  • The simulation of a single vehicle and traffic light indicated that TLVC can reduce fuel consumption up to 22 percent and decreased CO, NOx, and particulate matter emissions up to 80 percent, 35 percent and 18 percent, respectively.
  • Suboptimal gear choice, however, voided these benefits. The authors recommended that future applications supplement speed advice with gear shifting advice.
  • The network simulation model with multiple vehicles indicated that TLVC can reduce fuel consumption by 8 percent.

Benefit Comments

No comments posted to date

Comment on this Benefit

To comment on this summary, fill in the information below and click on submit. An asterisk (*) indicates a required field. Your name and email address, if provided, will not be posted, but are to contact you, if needed to clarify your comments.


The Impact of Traffic-Light-to-Vehicle Communication on Fuel Consumption and Emissions

Author: Tielert, T,, M. Killat, H., Hartenstein, et al.

Published By: Proceddings of the Internet of Things Conference

Source Date: November 2010

Other Reference Number: pp. 1–8.



Average User Rating

0 ( ratings)

Rate this Benefit

(click stars to rate)

Typical Deployment Locations

Metropolitan Areas


None defined

Benefit ID: 2015-01035