Library: 1211 - NTCIP Objects for SCP

Document Number: Document Type: Former Doc. Number: Document Status: Published:
1211 Device Data Dictionary none Jointly Approved
Developed By: Signal Control and Prioritization Working Group
Point of Contact: Jim Jarzab, VTA
John Thai, City of Anaheim
Published: Published and available for free download. Click to shopping cart above to register and download the document.
Description of Document:
This NTCIP data dictionary defines the management information base for Signal Control and Prioritization (SCP) systems through parameters that represent the configuration, status, and control information. NTCIP 1211 defines the functional entities of a Priority Request Generator and a Priority Request Server, which respectively originates and performs triage on requests. After performing triage in terms of importance and priority, the requests are sent to the Coordinator entity in a Traffic Signal Controller.

Document Status:

Date submitted: 10/14/2010

SCOPE AND BACKGROUND -- NTCIP 1211 defines data elements for information management and operations of signal control and prioritization (SCP). NTCIP 1211 organizes functional requirements and user requirements, and includes scenarios and use cases. The NTCIP SCP WG invented the functional entities of a “Priority Request Generator” and a “Priority Request Server,” which respectively originates and performs triage on requests. After performing triage in terms of importance and priority, the requests are sent to the Coordinator entity in a Traffic Signal Controller.

NTCIP 1211 includes the management of multiple requests for priority or preferential treatment of different classes of vehicles, such as transit, emergency service, and commercial fleet vehicles. NTCIP 1211 defines a method of granting priority to one signal while maintaining coordination with adjacent intersections. NTCIP 1211 is intended to work in conjunction with the coordination object definitions and functions defined in NTCIP 1202, Object Definitions for Actuated Signal Controllers.

NTCIP 1211 is maintained by the NTCIP SCP WG. The SCP WG maintains liaison with: the TCIP II Dialogs project, and with the IEEE WG14 for HRI (IEEE P1570, "Standard for Interface Between the Rail Subsystem and the Highway Subsystem at a Highway Rail Intersection.")

VERSION v01 -- In November 2000, the NTCIP 1211 v01 draft was started. In July 2002, the Joint Committee accepted 1211v01.25 as a User Comment Draft, and Standards Bulletin B0079 sent 1211v01.26 out for User Comment. In February 2004, the Joint Committee accepted NTCIP 1211 v01.36 as a Recommended Standard, and Standards Bulletin B0096 sent 1211v01.37 for ballot and approval. In December 2005, NTCIP 1211 v01.37 was Jointly Approved.

In May 2008, NTCIP 1211 v01.38 was edited and published as a no-cost PDF download. In October 2008, the hardcopy version of NTCIP 1211 v01.38p (May 2008 edition) was available for order, printed with a softcover. To order the standard, point to the mouse-over menu "Deployment" >> Order Standards.

NAVIGATE THE PDF -- To help users navigate the large document, the PDF file was authored with embedded links. The links can be found in the Table of Contents, and in the Annex A PRL table's self-reference clauses. To use the links when browsing with Adobe(R) Reader(R), select the Hand tool, and the Hand will change to the pointing finger when over a link. To return to the prior page after clicking a link, use Alt+Left Arrow to return to the Previous View. See the Reader's View menu for more shortcuts.

The NTCIP SCP CO and PRS MIB files are available. To request access, see the instructions in the Library pulldown.

VERSION v02 -- In 2006, NTCIP 1211 v02 was planned with systems engineering content and test procedures. Between 2008 to 2009, draft ConOps, requirements, and test procedures were prepared and reviewed, and six key concerns of the ITS JPO addressed. In April 2010, the ITS JPO modified the work order including 1211 v02, and deleted the test procedures and the requirements-to-test case traceability matrix. The SCP WG and SDOs were tasked to deliver the UCD, and RS, and published PDF. The SCP WG had 1211 v02.07, last revised 07/17/08, as a Pre-UCD draft to check user needs, requirements and design only.


The NTCIP 1211 v01 updated MIB and revisable PRL are expected to be available soon.

October 2010 -- the NTCIP 1211 v02 user comment draft will be issued, but with the late re-start on 1211 v02, the Recommended Standard and published versions are not expected by December 2010.


NTCIP documents are distributed in Adobe® Acrobat® format. Version 9 of the Acrobat Reader® is recommended. To get Adobe® Acrobat Reader®, click here.

Return to NTCIP home page Site last updated: June 17, 2014
© 1997-2014 AASHTO, ITE, NEMA. Portions © 1997-2014 Weblynx®.
NTCIP is a Trademark of AASHTO, ITE, NEMA.

This site was developed by Weblynx Corporation under contract with the National Electrical Manufacturers Association.
Information contained within this site may not be reproduced without written approval of
RITA ITS JPO and/or AASHTO and/or ITE and/or NEMA and/or Weblynx.