(From March 2001 Environmental Assessment, Federal Highway Administration and N.C. Department of Transportation)

Three noise walls meet the requirements of the state Department of Transportation's noise abatement policy and are included in preliminary construction plans.

First Proposed Noise Wall - West side (toward downtown) of the highway between U.S. 64 and Kildaire Farm Road, 3,900 feet long and 13 to 20 feet high. Concrete. Estimated cost $556,200.

Second Proposed Noise Wall - West side of the highway between Cary Parkway and Walnut Street, 6,937 feet long and 13 to 21 feet high. Concrete. Estimated cost $1,567,000.

Third Proposed Noise Wall - East side (away from downtown) of the highway between Cary Parkway and Walnut Street, 2,303 feet long and 16 to 18 feet high. Concrete. Estimated cost $528,600.