White or yellow pavement marking lines that delineate the right or left edge(s) of a traveled way. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

The traveled way is the portion of the highway for the movement of vehicles not including shoulders. The edge of traveled way is often delineated by the “fog line” or edge of pavement.

A system for automated collection of tolls from moving or stopped vehicles through wireless technologies such as radio-frequency communication or optical scanning. ETC systems are classified as one of the following: 1. systems that require users to have registered toll accounts, with the use of equipment inside or on the exterior of vehicles, such as a transponder or barcode decal, that communicates with or is detected by roadside or overhead receiving equipment, or with the use of license plate optical scanning, to automatically deduct the toll from the registered user account, or 2. systems that do not require users to have registered toll accounts because vehicle license plates are optically scanned and invoices for the toll amount are sent through postal mail to the address of the vehicle owner. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A non-attended toll lane that is restricted to use only by vehicles with a registered toll payment account. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A special type of hybrid beacon used to warn and control traffic at an unsignalized location to assist authorized emergency vehicles in entering or crossing a street or highway. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A special traffic control signal that assigns the right-of-way to an authorized emergency vehicle. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

A device used to warn and alert road users of the end of a roadway in other than temporary traffic control zones. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

The evaluation of available pertinent information, and the application of appropriate principles, provisions, and practices as contained in this Manual and other sources, for the purpose of deciding upon the applicability, design, operation, or installation of a traffic control device. Engineering judgment shall be exercised by an engineer, or by an individual working under the supervision of an engineer, through the application of procedures and criteria established by the engineer. Documentation of engineering judgment is not required. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

The comprehensive analysis and evaluation of available pertinent information, and the application of appropriate principles, provisions, and practices as contained in this Manual and other sources, for the purpose of deciding upon the applicability, design, operation, or installation of a traffic control device. An engineering study shall be performed by an engineer, or by an individual working under the supervision of an engineer, through the application of procedures and criteria established by the engineer. An engineering study shall be documented. MUTCD 2009 Edition with May 2012 Revisions 1 and 2

An automatic gate that can be lowered across the lanes approaching a grade crossing to block road users from entering the grade crossing. MUTCD 2009 Edition with May 2012 Revisions 1 and 2