Benefit

V2I advisory speed limit systems that smooth traffic flow on urban arterials can improve fuel economy by eight percent and reduce NOx emissions by nine percent.

Modeling the impacts of V2I intelligent speed control applications operating on DSRC versus cellular networks.


04/06/2016


Summary Information

This paper presented a study of advisory speed limit (ASL) green driving strategies in signalized intersections using car-following models and simulated traffic scenarios across a range of market penetration rates. The system was designed to advise travel speeds to connected vehicles based on traffic signal timing settings and traffic information obtained from V2I communications.

METHODOLOGY

The ASL control algorithm objective function used to calculate recommended travel speeds was designed to smooth vehicle trajectories in stop-and-go traffic while taking into account variables such as market penetration rates, traffic congestion levels, V2I communication modes (DSRC or Cellular), GPS location accuracy, car-following behavior (Gipps model) and the network structure.

FINDINGS

Benefits were greater if V2I communications were carried out over cellular networks instead of DSRC. This observation suggested that the longer communication ranges of cellular networks were more important for this application than the shorter communication delays of DSRC.

Cellular Networks

Market Penetration
25.0%
50.0%
75.0%
100.0%
HC emissions
-1.5%
-1.9%
-2.1%
-2.6%
CO emissions
0.0%
0.1%
0.1%
-0.3%
NOx emissions
-5.9%
-7.8%
-8.2%
-9.1%
CO2 emissions
-4.7%
-6.2%
-6.8%
-0.1%
Fuel consumption
-4.6%
-6.2%
-6.7%
-7.9%


DSRC Networks

Market Penetration
25.0%
50.0%
75.0%
100.0%
HC emissions
-0.5%
-0.9%
-1.1%
-1.1%
CO emissions
0.7%
0.6%
0.6%
0.7%
NOx emissions
-3.3%
-4.3%
-4.7%
-4.8%
CO2 emissions
-2.7%
-4.2%
-5.0%
-5.3%
Fuel consumption
-2.7%
-4.1%
-5.0%
-5.3%

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Source

Mobility and environment improvement of signalized networks through Vehicle-to-Infrastructure (V2I) communications

Author: Ubiergo, Gerard Aguilar and Wen-Long Jin

Published By: Elsevier

Source Date: 04/06/2016

Other Reference Number: Transportation Research Part C, 68 (2016), pp70–82

URL: http://www.sciencedirect.com/science/article/pii/S0968090X16300031

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Typical Deployment Locations

Metropolitan Areas, Rural Areas

Keywords

None defined

Benefit ID: 2017-01149