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Pages 72-73

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From page 72...
... 72 C H A P T E R 1 0 This chapter focuses on guidance on the use of tree zones within FHWA TNM. Appendix I (available on the NCHRP Project 25-34 web page at http://apps.trb.org/cmsfeed/ TRBNetProjectDisplay.asp?
From page 73...
... 73 that site perpendicular to the roadway. This is measured by walking into the vegetation until no longer visible from the outside and then averaging this visibility distance over three tries at each of two locations.

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