WZSC Glossary

WZSC Glossary composed of MUTCD, NIOSH, OSHA, AASHTO

Browse the glossary using this index

Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL

C

Cantilevered Signal Structure

A structure, also referred to as a mast arm, that is rigidly attached to a vertical pole and is used to provide overhead support of highway traffic signal faces or grade crossing signal units. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

CATENARY

An overhead wire conductor and support system that supplies the 750-volt direct current (DC) power to the streetcar’s current collecting pantograph.

Center Line Markings

The yellow pavement marking line(s) that delineates the separation of traffic lanes that have opposite directions of travel on a roadway. These markings need not be at the geometrical center of the pavement. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

Certification

A process which assesses an individual's knowledge and skills to determine if the individual meets a minimum standard of qualification.

CFR

Code of Federal Regulations MUTCD 2009 Edition with May 2012 Revisions 1 and 2

Changeable Message Sign

A sign that is capable of displaying more than one message (one of which might be a "blank" display), changeable manually, by remote control, or by automatic control. Electronic-display changeable message signs are referred to as Dynamic Message Signs in the National Intelligent Transportation Systems (ITS) Architecture and are referred to as Variable Message Signs in the National Electrical Manufacturers Association (NEMA) standards publication. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

Channelizing Devices

The function of channelizing devices is to warn road users of conditions created by work activities in or near the roadway and to guide road users. ... Channelizing devices provide for smooth and gradual vehicular traffic flow from one lane to another, onto a bypass or detour, or into a narrower traveled way. They are also used to channelize vehicular traffic away from the work space, pavement drop-offs, pedestrian or shared-use paths, or opposing directions of vehicular traffic. ... Channelizing devices include cones, tubular markers, vertical panels, drums, barricades, and longitudinal channelizing devices. MUTCD 2009 Edition with May 2012

Channelizing Line Markings

A wide or double solid white line used to form islands where traffic in the same direction of travel is permitted on both sides of the island. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

CHASE VEHICLE

The vehicle that enters the road first in a rolling slowdown. The chase vehicle moves forward with traffic in front of the rolling blockade, positioning itself behind the last through vehicle before entering the work space. Seeing the chase vehicle go by, workers can move into the open travel lanes and begin working.

Chock

A wedge or block for blocking the movement of a wheel.

Page: 1 2 3 4 (Next)
ALL