HTML of the Student Supplement
(Note: This document has been converted from the Student Supplement to 508-compliant HTML. The formatting has been adjusted for 508 compliance, but all the original text content is included, plus additional text descriptions for the images, photos and/or diagrams have been provided below.)
Table of Contents
Introduction/Purpose - 2
History of the Standard - 2
Reference to Other Standards - 3
Glossary - 4
Actuated Signal Controller Characteristics - 5
References - 5
Study Questions - 6
Module Description
This module is a part of the acquisition curriculum path with I101, A101, A102, and A201 being the prerequisites. This module is the first step leading to the user being able to write specifications with a focus on Actuated Traffic Signal Controller (ASC) user needs. The next logical step is A315b: Understanding Requirements for Actuated Traffic Signal Controllers Based on NTCIP 1202 Standard, which focuses on ASC requirements. The logical next step for the participant is to consider modules in the testing lifecycle, which are T101, T201, and T202; and T203 Parts 1 and 2, and T204, which lead up to the T315 module: Applying your Test Plan to the NTCIP 1202 ASC Standard v03.
1. Introduction/Purpose
This module provides participants with information on how to identify their user needs for an Actuated Traffic Signal Controller (ASC). NTCIP 1202 v03, Object Definitions for Actuated Signal Controllers, was recently updated and published. This standard defines object (s)? to allow transportation professionals to monitor, configure and control traffic signal controllers. Version 3 of the standard was developed using a Systems Engineering Process (SEP) and contains user needs, requirements and design content. The SEP allows transportation managers and specification writers to more easily prepare a Procurement Requirements List (PRL) for ASC procurement specifications.
The purpose of this updated module is to incorporate necessary changes made by the updated NTCIP standard v03 (from v02) and assist technical staff in writing unambiguous, complete, and well-written user needs based on NTCIP 1202 v03. This module provides participants with information on how to identify the appropriate use of the NTCIP 1202 v03 and acquire a traffic signal control system based on what the user is seeking to accomplish. This module also provides participants with information on how to identify user needs that can be traced to requirements, which will be discussed in A315b: Understanding Requirements for Actuated Traffic Signal Controllers Based on NTCIP 1202 Standard. This module helps the participant understand the interdependency of NTCIP 1202 objects to the architecture and functionality of NEMA TS2.
This module will provide participants with information to understand the scope of the NTCIP 1202 v03 Standard, identify the appropriate use of the Standard to acquire an Actuated Traffic Signal Controller or ASC system, and how to prepare (tailor) their ASC project specification based on the information provided by the Standard. Based on what the user is seeking to accomplish, the module will demonstrate how to use tools and resources in the Standard such as the PRL and the Systems Engineering Process.
2. History of the Standard
3. Reference to Other Standards
Actuated Traffic Signal Controllers
NTCIP
Systems Engineering
4. Glossary
| Term | Definition |
|---|---|
| ADA | Americans with Disability Act |
| ASC | Actuated Traffic Signal Controller |
| Agency Specification | A document that has been prepared by an agency to define requirements for a subject item or process when procured by the agency. |
| Agent | The entity that receives commands and transmits responses to the received commands. |
| Compliance | A condition that exists when an item meets all of the requirements of an agency specification. |
| Concept of Operations | A document that describes the purpose for a system project, including a description of the current and proposed system, as well as key user needs that the new system is required to address. |
| Conformance | A condition that exists when an item meets all of the mandatory requirements as defined by a standard. It can be measured on the standard as a whole, which means that it meets all mandatory (and applicable conditional) requirements of the standard or on a feature level (i.e., it conforms to feature X as defined in section X.X.X), which means that it meets all mandatory (and applicable conditional) requirements of the feature. |
| Dialogs | A sequence of information or message exchanges. |
| Interoperability | The ability of two or more systems or components to exchange information and use the information that has been exchanged. Note: From IEEE Standards Dictionary, Glossary of Terms and Definitions. |
| Manager | The entity that sends commands to entities and processes their responses. |
| MAP message | The MAP Data message is used to convey many types of geographic road information. At the current time, its primary use is to convey one or more intersection lane geometry maps within a single message. Note: From SAE J2735_201603 |
| MIB | Management Information Base. A structured collection or database of related managed objects defined using Abstract Syntax Notation One (ASN.1). Note: From NTCIP 8004 v02 and ISO/IEC 8824-1:2008 and ISO/IEC 8825-1:2008. |
| Object Identifier | A unique name (identifier) that is associated with each type of object in a MIB that is a defined ASN.1 type. |
| Roadside Unit (RSU) | DSRC devices that serve as the demarcation component between vehicles and other mobile devices and existing traffic equipment. Note: From DSRC Roadside Unit Specification Document v4.1 |
| SPaT message | The Signal Phase and Timing (SPAT) message is used to convey the current status of one or more signalized intersections. Along with the MSG MapData message (which describes a full geometric layout of an intersection) the receiver of this message can determine the state of the signal phasing and when the next expected phase will occur. Note: From SAE J2735_201603 |
5. Actuated Signal Controller Characteristics
Cabinet Specifications
Some user needs defined within NTCIP 1202 v03 apply only to ASCs using a specific transportation cabinet architecture. There are five transportation cabinet architectures that are commonly used in North America.
6. References
Systems Engineering
7. Study Questions
Question 1: Which of the below is not a true statement about NTCIP 1202 v03?
Question 2: Which of the following is a benefit of extensions?
Question 3: Which of the following is a benefit of the PRL table?
Question 4: Which of the following is a FALSE statement related to an ASC specification?