Nationwide Interoperability
The IBTTA Interoperability Committee is composed of representatives of IBTTA member toll agencies and firms that provide services to the toll industry. The charge of this committee is to advance the strategic plan goal of achieving nationwide interoperability in the United States.
Support Documents and Information
Current Version
National Interoperability (NIOP) Business Rules, Version 2.0
- Business Rules for National Interoperability Version 2.0 FINAL (2023-05-01)
- Business Rules for National Interoperability – Appendix A – Reports Version 1.00 FINAL (2023-05-01)
National Interoperability (NIOP) Interface Control Document (ICD):
NIOP ICD Version 2.0
- National Interoperability Interface Control Document (ICD) Version 2.0 (2023-05-01)
- NIOP ICD Appendix A (Released 2018-11-26) - Hub IDs
- NIOP ICD Appendix B (Released 2022-09-16) - NIOP Agency IDs
- NIOP ICD Appendix C (Released 2024-02-23) - NIOP Tag Agency IDs (New)
- NIOP ICD Appendix D (Released 2022-11-3) - TVL Schedule
- NIOP ICD Appendix E (Released 2019-02-01) - License Plate Types
- NIOP Appendix F - State Codes (Released 2023-05-01)
NIOP ICD Appendices are updated regularly and are identified by the release date.
Prior Versions
National Interoperability (NIOP) Business Rules Version 1.01
- NIOP Business Rules (Version 1.01 Final Released 20190507)
National Interoperability (NIOP) Interface Control Document (ICD) Version 1.2
- NIOP ICD Version 1.02 Final Released 2019-05-07)
- NIOP ICD Appendix A (Released 2018-11-26)
- NIOP ICD Appendix B (Released 2022-09-16)
- NIOP ICD Appendix C (Released 2022-09-16); NIOP ICD Appendix C (Released 2023-12-19) - NIOP Tag Agency IDs
- NIOP ICD Appendix D (Released 2022-11-3)
- NIOP ICD Appendix E (Released 2019-02-01)
NIOP Agency ID Assignment and Coordination (2021-04-05)
2018
Interoperability: Towards the New Frontier (ITS International)
2017
In May 2017 IBTTA finalized the test plan describing the methodologies and procedures to be used in conducting the Phase 2 NIOP protocol performance testing. The following documents describe both the test approach and the plan methodologies. This plan was developed in consultation with both toll operators and the technology manufacturers. The goal of the plan is to accomplish the following:
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Provide statistically sound NIOP testing results at 80% confidence
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Stage and prioritize tests to minimize cost and duration
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Limit test cases to those that involve variables that are expected to impact results
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Where possible, maximize testing in a lab setting
2016
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Resolution On Interoperability Next Steps as adopted by the IBTTA Board on January 8, 2016
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Update on IBTTA's effort to achieve nationwide interoperability of electronic toll collection systems (September 2016)
2015
Status on Interoperability – Subcommittee on Transportation and Public Assets of the U.S. House Oversight and Government Reform Committee (September 28, 2015). Below are copies of testimony and related documents.
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Patrick Jones, Executive Director (on behalf of IBTTA)
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Tom Knuckey, Member of the IBTTA Interoperability (IOP) Steering Committee and Chair, IBTTA Roadside Operations Subcommittee (on behalf of the IBTTA IOP Committee)
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JJ Eden (on behalf of the Alliance for Toll Interoperability (ATI)
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Andrew Fremier (on behalf of the California Toll Operators Committee (CTOC)
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Diane Gutierrez-Scaccetti (on behalf of Florida's Turnpike Enterprise/FDOT), Miami-Dade Expressway Authority and Tampa-Hillsborough Expressway Authority
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P.J. Wilkins (E-ZPass Interagency Group)
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Jeffrey Lindley (Federal Highway Administration, U.S. DOT)
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IBTTA issued RFP for consulting and technical services that support the testing, certification and selection of the National Interoperability (NIOP) protocol. View RFP // RFP FAQ
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Supplier Sponsorship Letter | Attachment 1 – Traceability Matrix
2014
Board Briefing on Subcommittee Activities:
2013
2011-2012
