NTCIP Publishes ASC Objects Standard - NTCIP 1202
March 12, 2007 // Published as a news service by IHS
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The American Association of State Highway and Transportation Officials (AASHTO), Institute of Transportation Engineers (ITE) and National Electrical Manufacturers Association (NEMA) published the National Transportation Communications for IT Personnel (NTCIP) 1202:2005 - Object Definitions for Actuated Traffic Signal Controller (ASC) Units - version 02 (NTCIP 1202 v02).
The NTCIP 1202 v 02 is a data dictionary standard that defines the data elements and conformance requirements for traffic signal controllers.
The first version was published as NEMA TS 3.5-1996, which then became the jointly approved NTCIP 1202:1997 v01.07. Version 02 was developed to add new features from lessons learned and to update the document format, the groups said.
The NTCIP 1202 v02 standard is used for communicating between system nodes, such as between a traffic management center and the traffic signal controllers at a transportation agency's roadway intersections.
The data in the standard is defined using specifications from the Internet, and in the NTCIP 1202, expresses a signal system's operating parameters, functional controls and status information.
Function controls include:
- Signal Phases
- Detectors; Coordination
- Preemption
- Upload and Download
- Block Object Data for efficient device configuration (Version 2.0 only).
NTCIP 1202 v02 also includes an information profile that provides a "checklist" for all the data elements related to both the traffic control and the communications functions as implementation needs.
The standard includes sections on consistency checking, which defines how a controller unit checks to see if the data values in the various functions make sense when viewed from an overall perspective, the concept of operation, which defines how the sequence of information is exchanged between a management station and a controller unit.
The NTCIP 1202 v02 was developed by the NTCIP Joint Committee ASC Working Group, which is co-chaired by Peter Ragsdale (U.S. Traffic of Quixote Traffic Corporation) and Elizabeth Ramirez (City of Dallas). The ASC Working Group had 26 members and contributors, from both the public and private sectors, who participated in the project.
Through funding from U.S. Department of Transportation's ITS Joint Program Office, the standard is being offered for download for a limited time at no cost on the NTCIP web site at http://www.ntcip.org/library/standards/default.asp?documents=yes&qreport=no&standard=1202.
The standard is also available in a printed soft-cover edition.
Source: National Transportation Communications for IT Personnel (NTCIP).