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SAE J2945/B_202511

Name: SAE J2945/B_202511 PDF | Request Standard
SKU: c62cc874bb3a

Minimum Requirements to Support Traffic Signal Priority and Preemption

Standard by SAE International, 2025-11-20

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SAE J2945/B_202511.PDFSecure PDF
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Language: English
License Type: Single User
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Language: English
License Type: Enterprise / Multi User
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About This Item

When identifying the content of this report, one of the goals was that it supports a nationally interoperable method for connected vehicles (CVs) to make traffic signal priority and/or preemption (TSPP) requests of connected intersections (CIs) that support priority and/or preemption services. Given that, this report specifies the over-the-air (OTA) interface between CVs and CIs to support TSPP applications using updated revisions of the SAE J2735 Signal Request Message (SRM) and Signal Status Message (SSM) and the use of a Wireless Access in Vehicular Environments (WAVE) Service Advertisement (WSA) to advertise support for TSPP at a CI. Included are a concept of operations, requirements, design, and message structure definitions developed using a detailed systems engineering process. There is a strong interest in both the automotive and infrastructure owner operator communities to have support for traffic signal priority and preemption capability at connected signalized intersection locations nationwide in the early phases of deployment. To support nationwide deployment, common messages, message content, and requirements are needed to support interoperability between connected vehicles and connected intersections.

SKU: c62cc874bb3a

Publication Date: 2025-11-20

Standard Status: latest

Publisher: SAE International

Document Type: Ground Vehicle Standard

Subject: Traffic management, , , , , , , ,

Official SAE: Doi link

This Version: J2945/B_202511 (2025-11-20)
Previous Version: J2945/A_202410 (2024-10-25)
Previous Version: J2945/A_202404 (2024-04-01)
Previous Version: J2945/C_202206 (2022-06-09)
Previous Version: J2945_201712 (2017-12-07)

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