ITS World Congress 2017 Montreal, October 29 – November 2 1 Paper AP-SP1119 Positioning and collision alert investigation for DSRC-equipped light vehicles through a case study in CITI Adriana Simona MIHAITA 1* , Paul Tyler 1 , John Wall 2 , Vanessa Vecovsky 2 , Chen Cai 1 1*. Data61|CSIRO, 13 Garden St., Eveleigh, 2015, Australia, simona.mihaita@data61.csiro.au 2. Road for Safety and Technology, Transport for New South Wales, Wollongong, Australia Abstract Recent advanced transport technologies in vehicle-to-vehicle communications have paved the way for testing new solutions that would reduce congestion and prevent traffic incidents. The main objective of multiple transport agencies is to improve road safety by providing reliable and flexible solutions to all drivers on the roads. While significant efforts are put together for dealing with regulations and standard adoption, various questions regarding the practical performance and accuracy of such technologies are still to be tackled. This paper presents the results obtained from an ongoing research investigation focusing on testing the capabilities of Dedicated Short Range Communications (DSRC) to meet critical levels of road safety in terms of positioning accuracy. After previous analysis of positioning accuracy of heavy vehicles on a 42 km test-bed in Illawarra, Australia, we now focus on testing the positioning accuracy as transmitted by two light vehicles, engaged in five different simulation experiments of potential traffic collisions. Firstly, as ground truth is not available, we conduct a comparative analysis of transmitted positioning through Basic Safety Messages by using both Open Street Map and Google Street Map as reference, and show the latter provides better accuracy in positioning error computation. Secondly, we present the results obtained when analyzing the collision alerts broadcasted during the incident demonstrations. The findings indicate that speed, breaking and DSRC installation might influence the successful transmission of collision alerts to the surrounding drivers and can be used as a guideline for future settings of using DSRC equipped vehicles in light vehicles. KEYWORDS: DSRC, connected vehicles, positioning accuracy, collision alert investigation, road safety. 1. Introduction Traffic congestion and road vehicle collisions are one of the most important problems in concentrated urban areas around the globe, leading to almost 1.24 million road traffic deaths per annum [1]. In order to address this issue, advanced transport technologies such as Vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications are already being tested and recent studies show the benefits of adopting these technologies in terms of life-savings and economic impact [2]. Recent advancements in wireless communication technologies have led to the emergence of dedicated short-range communication (DSRC), which has been designed to support V2V communications, enhance mobility and improve road safety [3]. As vehicular communications need fast interoperability, U.S., Europe and Japan have assigned dedicated bandwidths for DSRC communications [4]. In order to assess the performance and safety benefits of DSRC, various projects and test bed initiatives have concentrated on: testing the effective communication range between two vehicles and security protocols [5], analysing the