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Supplemental Guidance on the Application of FHWA’s Traffic Noise Model (TNM) (2014) / Chapter Skim
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Pages 65-68

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From page 65...
... 65 C H A P T E R 8 This chapter focuses on guidance on the use of topographic features within FHWA TNM. Appendix G (available on the NCHRP Project 25-34 web page at http://apps.trb.org/cmsfeed/ TRBNetProjectDisplay.asp?
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From page 66...
... 66 roadway -- either (1) along the toe of slope for roadways on fill or (2)
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From page 67...
... 67 zero. For this condition, the barrier attenuation can be highly sensitive to barrier height.
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From page 68...
... 68 berm-top width (W) , keeping its original elevations from point to point.
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