Connected Vehicle Corridor Deployment and Performance Measures for Assessment

Authors

Howell Li, Purdue UniversityFollow
Jijo K. Mathew, Purdue UniversityFollow
Woosung Kim, Purdue UniversityFollow
Enrique Daniel Saldivar-Carranza, Purdue UniversityFollow
Jim Sturdevant, Indiana Department of TransportationFollow
W. Benjamin Smith, Indiana Department of TransportationFollow
Darcy M. Bullock, Purdue UniversityFollow

Recommended Citation

Li, H., Mathew, J. K., Kim, W., Saldivar-Carranza, E. D., Sturdevant, J., Smith, W. B., & Bullock, D. M. (2019). Connected vehicle corridor deployment and performance measures for assessment (Joint Transportation Research Program Publication No. FHWA/IN/JTRP-2019/28). West Lafayette, IN: Purdue University. https://doi.org/10.5703/1288284317108

DOI

https://doi.org/10.5703/1288284317108

Abstract

In November 2016, the American Association of State Highway and Transportation Officials (AASHTO) announced the Signal Phase and Timing (SPaT) challenge to state and local agencies to kick start infrastructure deployments for V2I communications. The challenge involved the deployment of Dedicated Short Range Communication (DSRC) infrastructure with SPaT broadcasts (current intersection signal light phase) on at least 20 signalized intersections in all of the 50 states by 2020. Although the roadmap for agencies to partner with the automotive industry is still evolving, it is important for Indiana to not only support the SPaT challenge, but also identify mutually beneficial opportunities for INDOT to partner with the automotive industry as Indiana has the second largest automotive related Gross Domestic Product (GDP) in the country.

During this study, connected traffic signal infrastructure was deployed at several locations around the state. The West Lafayette corridor SPaT message deployment was done using both traditional Dedicated Short Range Communication (DSRC) as well cellular communication. This report details the deployment locations, the various public and private sector stakeholders that were engaged during the field testing, and several vehicle-infrastructure communication experiments that were used to evaluate connected vehicle use cases.

The findings of this research were as follows:

1. The team successfully demonstrated use cases for placing virtual vehicle detection calls to a traffic signal controller using SPaT messages and evaluated latency.
2. The team developed a scalable methodology for characterizing the probability of a traffic signal phase changing by time of day. This methodology of using agency traffic signal data for green light prediction and engine shut down at red lights is particularly useful to the automotive industry.
3. The team successfully demonstrated that split failures, reduced roadway friction and hard braking events can be identified on the vehicle and transmitted to an agency. This enhanced probe data information is particularly valuable to agencies for identifying traffic signal timing problems, segments impacted by winter weather and location where drivers are encountering roadway conditions required hard braking.
4. DSRC provides the lowest latency communication, but in general commercial cellular interface between vehicles and infrastructure provided acceptable latency for most use cases. For most applications, the team believes a commercial cellular interface between vehicles and infrastructure is the most scalable and feasible for an agency to maintain.

Report Number

FHWA/IN/JTRP-2019/28

Keywords

connected vehicle, DSRC, RSU, SPaT, split failures, roadway friction

SPR Number

4205

Performing Organization

Joint Transportation Research Program

Sponsoring Organization

Indiana Department of Transportation

Publisher Place

West Lafayette, Indiana

Date of this Version

2019