The positioning of emergency vehicles at an incident in a manner that attempts to protect both the responders performing their duties and road users traveling through the incident scene, while minimizing, to the extent practical, disruption of the adjacent traffic flow. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A public or private educational institution recognized by the state education authority for one or more grades K through 12 or as otherwise defined by the State. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

a designated roadway segment approaching, adjacent to, and beyond school buildings or grounds, or along which school related activities occur. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A type of traffic control signal operation in which at least one, but not all, signal phases function on the basis of actuation. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

The senior project supervisor has final authority and responsibility for safety and health on the project, ensuring correction or abatement of hazards, monitoring for potentially hazardous conditions, determining that competent persons are designated by contractors, notifying responsible contractor of conditions that may cause injury or illness, and maintaining project safety and health records [ANSI A10.33-1992 (R1998)].

A signal face that exclusively controls a turn movement and that displays signal indications that are applicable only to the turn movement. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

The component of maximum highway traffic signal preemption time during which the minimum track clearance distance is clear of vehicular traffic prior to the arrival of rail traffic. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A trailing vehicle used as a warning and traffic control vehicle in a mobile work zone. Shadow vehicles provide both the advance warning area and any lane or shoulder closures for a mobile work zone.

Indicates a mandatory condition or action.

A roadway that is officially designated and marked as a bicycle route, but which is open to motor vehicle travel and upon which no bicycle lane is designated. MUTCD 2009 Edition with May 2012 Revisions 1 and 2