The Traffic Management Data Dictionary (TMDD) Standards were developed to support center-to-center communications as part of the regional deployment of ITS in order for centers to cooperate in the management of a corridor, arterial, incident mitigation, event management, etc. Hence the TMDD provides the dialogs, message sets, data frames, and data elements to manage the shared use of these devices and the regional sharing of data and incident management responsibility. As a result, the TMDD standards often reference elements of the NTCIP standards, but deal with the devices at a higher level of abstraction.
The NG TMDD project is proposed to replace the current TMDD (TMDD v3.1), which is a mature standard, but evolve to address new and emerging operational needs and industry trends and technologies. The most notable of these trends is the emergence and role of private non-infrastructure owner/operators that collect and manage real-time transportation data. The need to share more granular data using a Systems to Systems approach to support multiple entities to achieve common operational goals must be addressed. For instance the need for high precision position information by current and future real-time maps require locational accuracy where lane-specific details about an event or device are required.
Additionally the next gen TMDD standard will also add features which include aligning with the Traffic Incident Management (TIM) model, the ability to define the complexity of work zone data, the ability to exchange discrete microscopic data at the unit vehicle level and finally to handle data from mobile sources (such as roadway weather data from snowplows), probe data, mobile/portable dynamic message signs, or connected vehicles.
Next Generation Traffic Mangement Data Dictionary is a Recommended Standard
The Institute of Transportation Engineers (ITE) adopted the Next Gen TMDD as a Recommended Standard (RS), this July, 2026, receiving no final comments or appeals. The final published versions of this Recommended Standard, Standardard Development Report, Volume 1 & 2, JSON Schema, and Comments Matrix Table (please see the bolded published documents in the version history table below). These standards will be jointly published by ITE and AASHTO.
Any comments, or appeals to the five bolded documents below must be made to standards@ite.org.
|
Version No. |
Name |
Overall Status/ Under Development |
Date |
| NGTMDD v1.0 | Standard Development Report | Published | 7/31/26 |
| ngTMDD Volume I - ConOps and Requirements | Published | 7/31/26 | |
| ngTMDD Volume II - Design Document | Published | 7/31/26 | |
| JSON Schema | Published | 3/20/26 | |
| Comment Matrix Table | Published | 3/23/26 | |
| Draft System Design Details (SDD) | Published | 10/25/2024 | |
| ngTMDD v0.1.1 | SRS Walkthrough Comment Resolution Report | Published | 1/19/2024 |
| ngTMDD v0.1 | Final SRS | Published | 1/19/2024 |
| SRS Walkthrough Plan | Published | 9/4/2023 | |
| ngTMDD v0.1 | Draft System Requirement Specification (SRS) | Published | 8/31/2023 |
| ngTMDD v0.1 | Final ConOps | Published | 5/31/2023 |
| ConOps Walkthrough Comment Resolution Report | Published | 5/31/2023 | |
| ConOps Walkthrough Plan | Published | 3/7/2023 | |
| ngTMDD v0.1 | Draft Concept of Operations (ConOps) | Published | 3/22/2023 |
| System Engineering Management Plan (SEMP) | Published | 8/16/2022 | |
| Project Management Plan (PMP) | Published | 9/15/2022 | |
| Published | Concluded 9/30/2024 | ||
| Period of Performance (POP) | 6/21/2022 - 6/20/2025 |
To participate in this project, please email as follows:
Address: standards@ite.org