A trusted and secure environment for connected vehicle messaging.



The Situation Data Exchange (SDX)® is a one-stop shop for critical, authenticated traveler information – a centralized data retention and distribution source for connected and autonomous vehicle (CAV) information such as Traveler Information Messages (TIMs). Originally developed under funding from the United State Department of Transportation (USDOT) for its Connected Vehicle Pilot Program, Trihydro took over system ownership in early 2019. SDX supports CAV messages covering roadways for all 50 states.
With SDX, Departments of Transportation (DOTs) can distribute important traveler and work zone information to drivers, helping increase safety and creating efficiencies in traffic flow and route planning. The SDX is available as a standalone CAV messaging solution or as a complement to existing CAV infrastructure.

Platform Features

  • Secure Interface Secure interface for data deposits and queries 
  • geographic security Geographic security restrictions 
  • High performance High performance queries 
  • enhanced distribution Enhanced distribution for CAV messages
  • common platform Common platform for third-party CAV message distribution
  • complements Complements existing CAV data systems


SDX provides a secure interface for depositing and querying CAV messages.

  • API tokens for authenticated deposits and queries
  • SCMS certificates required for CAV message deposits ensures authenticated messaging
  • Authenticated DOT users required for message deposits


With SDX, there’s no need to worry about drivers receiving messages from untrusted

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SDX serves as a central third-party messaging repository service, which allows third parties to consistently retrieve reliable and accurate road and travel information. Current message support includes:

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Trihydro’s value to the WYDOT CVP project cannot be overstated. We were all dealing with a first-of-its-kind effort and the Trihydro team was a true partner – from digging into requirements and helping to integrate technology in our Transportation Management Center to ensuring smooth rollout to stakeholders. We continue to enjoy our working relationship with Trihydro and would highly recommend them to other DOTs.

Vince Garcia, GIS/IT Program Manager
Wyoming Department of Transportation

How It Works

SDX and the Alexa Traveler Information Skill: Supporting Vision Zero


Ready to gain the benefits of CAV messaging? We can help get you up to speed and provide you access to SDX in as little as a day. Steps to get started are as follows.

get started


  1. We set up a meeting to demo SDX and answer questions you may have.
  2. We help you create an account on our SDX Beta site.
  3. You review the API for deposits and queries.
  4. Your review the sample application for querying the SDX.
  5. We provide ongoing support for SDX updates.

Contact us to get started

Contact us today to help your DOT expand CAV messaging support in an easy-to-use platform.

Shane Zumpf Trihydro 
SDX Product Manager