A conical-shaped channelization device with a weighted base. Cones are used to temporarily redirect traffic traveling through a work zone or incident response area. Cones can be used in tapers and along tangent areas to separate traffic from a work space and guide traffic along a desired path.

A device used to detect and respond to improper or conflicting signal indications and improper operating voltages in a traffic controller assembly.MUTCD 2009 Edition with May 2012 Revisions 1 and 2

"Any occupational safety and health standard, or modification thereof, which has been adopted and promulgated by a nationally recognized standards-producing organization under procedures whereby it can be determined by the Secretary [of Labor] that persons interested and affected by the scope or provisions of the standard have reached substantial agreement on its adoption [and] was formulated in a manner which afforded opportunity for diverse views to be considered . . ." (OSH Act, Sec-3).

A means of detecting rail traffic that provides relatively uniform warning time for the approach of trains or light rail transit traffic that are not accelerating or decelerating after being detected. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A lane, preferential or otherwise, that is separated from the adjacent lane(s) only by a normal or wide lane line marking. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

a complete electrical device mounted in a cabinet for controlling the operation of a highway traffic signal. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

That part of a controller assembly that is devoted to the selection and timing of the display of signal indications. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

a street or highway other than a low-volume road (as defined in Section 5A.01), expressway, or freeway. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A lane operating in a direction opposite to the normal flow of traffic designated for peak direction of travel during at least a portion of the day. Counter-flow lanes are usually separated from the off-peak direction lanes by tubular markers or other flexible channelizing devices, temporary lane separators, or movable or permanent barrier. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A characteristic of a roadside appurtenance that has been successfully crash tested in accordance with a national standard such as the National Cooperative Highway Research Program Report 350, "Recommended Procedures for the Safety Performance Evaluation of Highway Features." MUTCD 2009 Edition with May 2012 Revisions 1 and 2