See Dropped Lane. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

White pavement marking lines that delineate the separation of traffic lanes that have the same direction of travel on a roadway. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A signal face displaying indications to permit or prohibit the use of specific lanes of a roadway or to indicate the impending prohibition of such use. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A "lateral buffer space may be used to separate the traffic space from the work space . . . [or a hazardous area], such as excavations or pavement drop-offs. A lateral buffer space also may be used between two travel lanes, especially [those carrying traffic in opposite directions]. The width of the lateral buffer space should be determined by engineering judgment" [FHWA 2000 (MUTCD: Section 6C.06)].

light emitting diode MUTCD 2009 Edition with May 2012 Revisions 1 and 2

See Sign Legend. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

See Signal Lens. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A self-inflating elliptical lighting fixture designed to produce uniform non-glare illumination.

Every device in, upon, or by which any person or property can be transported on light rail transit tracks, including single-unit light rail transit cars (such at streetcars and trolleys) and assemblies of multiple light rail transit cars coupled together. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

An air horn, steam whistle, or similar audible warning device (see 49 CFR Part 229.129) mounted on a locomotive or control cab car. The terms "locomotive horn," "train whistle," "locomotive whistle," and "train horn" are used interchangeably in the railroad industry. MUTCD 2009 Edition with May 2012 Revisions 1 and 2