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Raceway
An electrical enclosure that may also serve as a mounting structure for the
sign.
Readability
(Also conspicuity.) The quality that enables the observer to correctly perceive
the message. In transportation engineering, this word is being replaced
by conspicuity.
Recall
In signage, this refers to the ability of a viewer to remember the message
even when they are not viewing it.
Recognition
Refers to the ability of a viewer to identify the message.
Regulatory Sign
A sign having the primary purpose of conveying information concerning rules,
ordinances or laws.
Retainer
A framing member mounted around the perimeter of a sign face, and attached
to the sign cabinet structure. It is designed to attach the face to the
cabinet and/or intended to provide a decorating trim piece.
Return
The sides of a channel letter.
Reveal
An indented detail on a sign.
Reverse Channel Letter
A fabricated dimensional letter with opaque face and side walls.
Roof Sign
A building mounted sign erected on the roof of a building.
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