Category:902 Signals: Difference between revisions

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This article provides the [[902.1 Basis for Installation|basis for installation]] of traffic signals, discusses [[902.3 Basic Types of Signal Control| basic types of signal control]] equipment and hardware, their characteristics, uses, applications, [[902.8 Signal Operations and Maintenance|operations and maintenance]].  The policies, standards and guidelines set forth herein are in general accordance with [http://mutcd.fhwa.dot.gov/pdfs/2003r1/pdf-index.htm the ''Manual on Uniform Traffic Control Devices''] most recent edition and the subsequent rulings on requests for interpretations, changes, and experimentation, herein referred to as the ''MUTCD''.  Clarification, elaboration, or the elimination of options of the individual items, is contained herein so that conformity of application will be promoted in Missouri.   
This article provides the [[902.1 Basis for Installation|basis for installation]] of traffic signals, discusses [[902.3 Basic Types of Signal Control| basic types of signal control]] equipment and hardware, their characteristics, uses, applications, [[902.8 Signal Operations and Maintenance|operations and maintenance]].  The policies, standards and guidelines set forth herein are in general accordance with [http://mutcd.fhwa.dot.gov/pdfs/2003r1/pdf-index.htm the ''Manual on Uniform Traffic Control Devices''] most recent edition and the subsequent rulings on requests for interpretations, changes, and experimentation, herein referred to as the ''MUTCD''.  Clarification, elaboration, or the elimination of options of the individual items, is contained herein so that conformity of application will be promoted in Missouri.   
There are many aspects to be considered when inspecting construction quality and this article provides [[902.13 Construction Inspection Guidelines for Sec 902|construction inspection guidelines]].


This article has a [[902.12 Glossary|glossary]] and also relates to:
This article has a [[902.12 Glossary|glossary]] and also relates to:

Revision as of 09:06, 29 March 2007

Key Points


Traffic signals are electrically powered traffic control devices that warn or direct vehicular and pedestrian traffic to take some specific action. Traffic signals provide for the orderly assignment of right of way to conflicting traffic movements at intersections.

Traffic signals are not a complete solution for traffic problems. Traffic signals can sometime create additional congestion and cause additional delay to vehicles if improperly designed, installed, or maintained. Correctly designed and operated traffic signals installed at warranted locations will provide for the orderly movement of traffic, increase the intersection capacity, and in some instances, tend to reduce accidents. Coordinating and phasing and timing signals are very important.

Traffic signals are listed on the Highway Right of Way and Construction Program in the description of the type of improvement if there is a probability of future signal control. If signals cannot be justified, they are to be eliminated from the program at the earliest possible date.

This article provides the basis for installation of traffic signals, discusses basic types of signal control equipment and hardware, their characteristics, uses, applications, operations and maintenance. The policies, standards and guidelines set forth herein are in general accordance with the Manual on Uniform Traffic Control Devices most recent edition and the subsequent rulings on requests for interpretations, changes, and experimentation, herein referred to as the MUTCD. Clarification, elaboration, or the elimination of options of the individual items, is contained herein so that conformity of application will be promoted in Missouri.

There are many aspects to be considered when inspecting construction quality and this article provides construction inspection guidelines.

This article has a glossary and also relates to:

- flashers and signals for schools and other special applications

- signal indications and signing

- computer applications

- signal installations and equipment

- other design aspects of traffic signals.