This table has been been superseded by the Dec 31, 2007 summary table of noise barrier construction by state or jurisdiction. This new data table can be accessed at: Type II Noise Barrier Construction by State by Total Barrier Area Through 2007.

Table 3 lists the twenty-four States that have constructed at least one Type II barrier (i.e., barriers constructed for an existing highway). It should be noted that the National Highway System Designation Act of 1995 restricted Federal participation in Type II noise barriers to those projects that were approved before Novemeber 28, 1995 or are proposed along lands where land development or substantial construction predated the existence of any highway.

Table 3
Type II Noise Barrier Construction by State by Total Barrier Area Through 2004