NTCIP 1202 v04 Actuated Signal Control (ASC)

The United States Department of Transportation (USDOT) and the Institute of Transportation Engineers (ITE) and their standards development partners, AASHTO and NEMA have worked on ITS Standards since the inception of the ITS Standards Program over 20 years ago. This project includes the steps necessary to publish a “The National Transportation Communications for ITS Protocol (NTCIP) 1202 version 4”, hereinafter referred to as NTCIP 1202 v04, under the purview of ITE. The current version of NTCIP 1202 is version 3 (NTCIP 1202 v03), which incorporated new user needs, requirements, and design elements to better enable ASC to Roadside Unit (RSU) communications. Subsequently the Connected Intersections standardization project developed detailed guidance for interoperable deployments of connected intersections which include an ASC and RSU. Part of that effort identified new signal, phase, and timing (SPaT) concepts, such as the Assured Green Period (AGP), which need to be formally added to NTCIP 1202.

NTCIP 1202 v04 is to incorporate new and updated user needs, requirements and design elements resulting from the Connected Intersections standardization effort, results from the City of Anaheim NTCIP 1202 testing project, recommended changes from NTCIP 9014 Infrastructure Standards Security Assessment (ISSA) and other infrastructure owner operator (IOO) and vendor comments and suggestions. NTCIP 1202 version 4 will provide the ITS Community with a complete and correct standard that has been through a systems engineering process and supports full nationwide interoperability for ASCs.

Objective

The primary objective of this project is to publish a non-proprietary, industry-based consensus standard for object definitions in ASCs. The final output will be a published standard that supports center-to-field communications to support connected vehicle technology, updated, secure communication protocols such as SNMPv3, and to include resources for testing ASCs and their compliance with the standard.

NTCIP 1202 v04, an NTCIP standards publication, identifies and defines how a management station may wish to interface with a field device to control and monitor traffic signal controllers and associated detectors in an NTCIP-conformant fashion. NTCIP 1202 v04 may also identify and define how a traffic signal controller NTCIP 1202 v04 uses only metric units.

NTCIP 1202 v04 defines data elements for use with Actuated Signal Controller Units. The data is defined using the Simple Network Management Protocol (SNMP) object-type format as defined in RFC 1212 and the defined NTCIP format defined in NTCIP 8004. This data would typically be exchanged using one of the NTCIP 1103 recognized Application Layers (e.g., SNMP). Previous versions of NTCIP 1202 used SNMPv1. NTCIP 1202 v04 uses SNMPv3 and does not support SNMPv1.

• NTCIP 1202 v04 ASC Working Group Roster
• Standard Development Process Chart
• ITE's Antitrust and Conflict of Interest Meeting Guidelines