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To provide an additional opportunity for States to engage with their peers, FMCSA introduced the ITD State Spotlight in 2023. Every quarter, during an ITD Program Managers' meeting, a participating State presents their strategies to achieve their ITD goals, enabling other States to benefit from their experience and insights.

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ITD State Spotlight: Indiana

June 2024

Indiana is leveraging ITD funds to make it easier for CMV drivers to find places to park their trucks, with the goal of helping to reduce driver fatigue and improve highway safety. The State’s Truck Parking Information Management System (TPIMS) monitors availability in State-owned truck parking lots and tells drivers in real time where to find open spaces. Indiana’s Department of Transportation (INDOT) says the system is part of infrastructure upgrades at all of the State’s rest areas and welcome centers that will add more than 1,200 new parking spaces for trucks.

Keys to Success

When the TPIMS system was first deployed, it was less reliable and more costly to operate than expected. The INDOT team reassessed the design and found technology better suited for their needs. Indiana shares the problems, improvements, and lessons learned from its TPIMS, including how an adaptive response to challenges led them to build a successful system after a rocky start.

The Technology

Indiana’s TPIMS transmits parking information to drivers via dynamic road signs, ensuring a driver doesn’t pull off the road only to find a lot is already full.

The initial design included both primary and secondary types of detection technology: in-ground wireless magnetometers to detect and count vehicles entering and exiting the lot, and a license plate reader (LPR) system to identify each vehicle as it entered and left the lot and to determine how long it had stayed (dwell time). Design and development of several lots with TPIMS began in 2016 and was completed about two years later. Once the equipment was operating, INDOT noticed issues that seriously limited performance and added burdensome costs:

  • The wireless magnetometers’ battery life did not meet manufacturer specifications. Maintenance costs over time often exceeded the costs of the sensors themselves.
  • The LPR system presented multiple problems.
    • Performance issues with lower price/lower quality LPR camera equipment included poor recognition of license plates, especially in low light. Although infrared illumination could have improved performance, it had been excluded from the scope to reduce costs.
      Determining vehicle dwell time requires aggregating, storing, and analyzing license plate data, which is considered PII. Meeting PII security requirements requires highly complex software and onsite fiber-optics communications networks. Technical issues arose that would require scope changes; INDOT’s in-house team did not have the resources to conduct software changes and the team learned that onsite networks would require specialized contractors and impede construction of the parking sites.

    INDOT redesigned the system, removing the LPR system and replacing the wireless magnetometers with side-fire radar equipment, which has a longer lifespan and is easier to maintain. INDOT used ITD funding to upgrade the initial parking lots, which are now fully functional.

    Truck parking availability is now integrated with INDOT’s 511 Traveler Information System.

    Lessons Learned

    The problems: The magnetometers had hidden costs, such as ongoing maintenance; the LPR equipment wasn’t right for the job; and PII security required software changes the in-house team.

    The solutions: Keep maintenance in mind and assess the risks of using a new technology—INDOT’s detection technologies weren’t proven for use in parking lots when work began. A project team should ask themselves whether a technology was evaluated for short- and long-term use under the conditions specified for their project and how it compares with existing technologies. A team also should identify the risks and impacts of design changes made at any phase in the project and be realistic about the staff time and resources available to vet, deploy, and maintain a project.

    Fun Fact

    INDOT’s upgrade of rest areas and welcome centers adds much-needed truck parking across the State. Each welcome center also offers insights into local culture and history by highlighting themes such as the Indianapolis 500 annual auto race, Lake Michigan on the State’s northwestern border, and of course—basketball.