Utah Administrative Code
Topic - Transportation
Title R930 - Preconstruction
Rule R930-3 - Highway Noise Abatement
Section R930-3-2 - Definitions

(1) "Existing Noise Level" means the noise level, Leq, resulting from the natural and mechanical sources and human activity, considered to be usually present in a particular area.

(2) "Design Noise Level" means the noise level, Leq, calculated for the worst traffic noise conditions likely to occur on a regular basis using a method approved by FHWA.

(3) "Type I Project" means a highway construction project that is related to an increase in traffic noise-construction of a highway on new location or the physical alteration of an existing highway which substantially changes the alignment or increases the number of through-traffic lanes or the addition of auxiliary lanes or interchange ramps.

(4) "Type II Project" means a proposed highway project strictly for noise abatement on an existing highway.

(5) "UDOT" means Utah Department of Transportation.

(6) "FHWA" means Federal Highway Administration.

(7) "dBA" means decibels of sound expressed or measured using the "A" weighting scale of a sound-pressure level meter.

(8) "Leq" means the equivalent (average) sound level reported in units of dBA.

(9) "AASHTO" means American Association of State Highway and Transportation Officials.