In 2015, the USDOT awarded cooperative agreements to three pilot sites to implement a suite of connected vehicle applications and technologies. One of the key goals of the CV Pilot program is to produce and provide Open Data from the pilots to the public in a quick and useful manner. This will enable research into the effectiveness of emerging ITS technologies, preliminary development of third-party applications, and harmonization of data across similar collections.
The Wyoming CV Pilot program was the first site to complete its data pipeline and send continuous data to the ITS Public Data Hub, 1 an open source portal of publicly available, reusable, and open ITS research projects and data management tools. The Wyoming CV Pilot program has also provided valuable work and feedback to TMDD and SAE standards committees based on their implementations of CV standards. For example, Wyoming implemented the TMDD using a JSON REST API rather than XML and SOAP as specified by the standard. This use of JSON led to an improvement in bandwidth, as JSON requires smaller data sizes to contain the same amount of data as XML. Wyoming has offered their own resources to help create a JSON REST TMDD standard; however, some questions remain, including whether Wyoming’s solution maintains interoperability with other solutions. In addition, Wyoming leveraged additional fields above and beyond the J2735 BSM Part II standard in order to properly support heavy vehicles. Wyoming will continue to provide feedback to SAE as they collect data on performance of the BSM Part II trailer data elements. Additionally, feedback provided by the WYDOT team will be used as input for future SAE efforts to develop performance requirements for heavy vehicle applications. 1
The New York City Department of Transportation (NYCDOT) CV Pilot program is focused primarily on developing safety applications in support of its Vision Zero goals of eliminating traffic related deaths and reducing traffic related injuries. These applications use data from Vehicle to Vehicle (V2V), Vehicle to Infrastructure (V2I), and Infrastructure to Pedestrian (I2P) communications. 2 One application of this is the use of vehicle speed and location data to generate an audio alert when the posted speed limit is exceeded. Another application being developed is a “Mobile Accessible Pedestrian Signal System” for the cell phones of the visually impaired. This application will receive MAP (Mobile Application Part) and SPaT (Signal Phase and Timing) messages to provide intersection geometrics, PED signals, and vehicle signal information to assist blind pedestrians with crossing through the intersection safely. 2
The Tampa Hillsborough Expressway Authority (THEA) CV pilot program is the only program that provides logged BSM (Basic Safety Message), TIM (Traveler Information Messages), and SPaT message data to the ITS DataHub's CV Pilot Data Sandbox (Wyoming provides BSM and TIM messages only, NYCDOT does not yet provide data at the time of this writing). This data, updated daily, was available starting January 14th, 2019 in a variety of formats including CSV, JSON, XML, among others. Sample visualizations are provided demonstrating potential uses of the raw data, including a speed map and a longitudinal acceleration map. 3 To help users load, query, and export data efficiently from the ITS DataHub's CV Pilot Data Sandbox, a “Sandbox Exporter” tool has been provided. This tool is a free, open-source Python package that enables users to programmatically connect directly to data provided by THEA and Wyoming DOT. 4
- 1 a b U.S. DOT ITS JPO. (n.d.). Wyoming CV Pilot Data Sharing Leads the Pack. Retrieved June 4, 2020, from U.S. Department of Transportation Intelligent Transportation Systems Joint Program Office: https://www.its.dot.gov/pilots/wyoming_datasharing.htm
- 2 a b NYCDOT. (2020, 7 31). Project Scope. Retrieved from NYC Connected Vehicle Project: https://www.cvp.nyc/project-scope
- 3USDOT. (2020, 7 31). Connected Vehicle Pilot (CVP) Open Data. Retrieved from data.transportation.gov: https://data.transportation.gov/stories/s/Connected-Vehicle-Pilot-Sandbox/hr8h-ufhq#thea-signal-phasing-and-timing-(spat)-
- 4USDOT ITS-JPO. Sandbox Exporter GITHUB Page. Retrieved on July 31, 2020, from https://github.com/usdot-its-jpo-data-portal/sandbox_exporter