Lesson

Use multiple communications protocols (e.g. Cellular, Wifi, DSRC) to transfer data from mobile devices and optimize channel usage based on the use case when using Connected Vehicle systems to enhance weather observations.

Michigan DOT (MDOT) evaluated usage of environmental data in connected vehicle systems to support transportation agency management and operations.

03/08/2018
Lansing; Michigan; United States

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Lesson Learned


General Crosscutting
  • Agencies should build hardened platforms to increase the stability of the data collection and system operation.
  • Agencies should build hardened backhaul communications to increase the reliability of data transmission.
Implementation
  • Antennas installed on truck cabs are better than antennas installed on truck bed toppers.
  • Prepare packaged installation kits that contain all of the correct components required for each truck design.
  • Make sure there is an easy method for tracking changes in the device installed on each vehicle.
  • Installers should ensure mounting materials and processes alleviate impacts from environment and wear.
  • Design cables for easy installation and use wireless sensors if possible.
  • Installers should use a consistent measurement process for collecting metadata for the locations where devices are installed on vehicles. Once installed, it is necessary to measure the locations of the sensors and tires in relation to the GPS antenna. It helps having two people doing those tasks to be more accurate.
  • Installers should provide access to communication channels (e.g., Cellular, WiFi, DSRC).
Maintenance
  • Agencies should have spare kits available for replacements parts.
  • Agencies should have a maintenance program that includes annual maintenance inspection, review, and calibration.
  • Agencies should have a process for tracking shock degradation and compare to baseline for the vehicle.
  • Agencies should have a plan in place for vehicle turn-over as equipment will need to be removed from old vehicles and placed on new vehicles.
Infrastructure Field Devices
  • Agencies and field personnel should ensure compatible interface and applications between RSUs and traffic signal controllers.
  • Agencies should determine backhaul needs for the infrastructure for communicating with the back office.
  • Resource needs and cost of field deployment should be determined based on the existing infrastructure.
Mobile Devices
  • Agencies should be sensitive to installation issues and be diligent in documenting sensors on vehicles. The proprietary nature of OBD/CANBus data can be limiting (e.g., it is difficult to receive data beyond basic CANBus information).
  • Use multiple communication protocols (e.g., Cellular, WiFi, DSRC) to transfer data from the mobile devices to back-office systems to optimize communication channels based on the type and volume of data required for each use case.

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Source

Integrated Mobile Observations 3.0: Connected Vehicles for Road Weather Management - Project Summary Report

Author: Mixon, Lee T. and Jeffrey Brown

Published By: Michigan DOT (MDOT)

Source Date: 03/08/2018

Other Reference Number: SPR-1654

URL: https://www.michigan.gov/documents/mdot/IMO3_Final_Project_Summ_Rpt_Final_3-8-2018_625318_7.pdf

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Lesson ID: 2019-00898