BTS | Table 4-52: Highway Noise Barrier Construction

Bureau of Transportation Statistics (BTS) - Research and Innovative Technology Administration (RITA) - United States Department of Transportation (USDOT, US DOT or DOT)

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Table 4-52: Highway Noise Barrier Construction

(Miles)

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	Unknown	1970-79	1980-89	1990	1991	1992	1993	1994	1995	1996	1997	1998	Total 1970-98
Type I barriers^a	^d6	102	419	44	78	113	62	48	87	34	47	114	^R1,147
Type II barriers^b	0	70	128	19	18	18	22	16	32	15	31	22	391
All other types^c	N	2	28	0	U	U	U	U	6	0	1	1	79
Total length	6	175	575	63	96	131	84	64	125	49	78	137	1,623
Cost (1998 $ millions)	N	134	656	89	144	186	118	112	152	60	111	169	1,931

KEY: N = data do not exist; R = revised.

^a A Type I barrier is built on a highway project to construct a new highway or to physically alter an existing highway.

^b A Type II barrier is built to abate noise along an existing highway (often referred to as retrofit abatement) and is not mandatory.

^c All other types of barriers are nonfederally funded.

^d Have not been assigned a year of construction or a cost.

NOTES: Miles have been converted from kilometers.

Totals may not match the sum of yearly estimates due to rounding and converting from metric. 24 miles of barriers, while assigned a year of construction, cannot be assigned a cost. Data are produced on a 3-year cycle.

SOURCE: U.S. Department of Transportation, Federal Highway Administration, Office of Environment and Planning, HighwayTraffic Noise Barrier Construction Trends (Washington, DC: 2000), tables 1 and 3.