BTS | Table 4-52: Highway Noise Barrier Construction

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Table 4-52: Highway Noise Barrier Construction

(Miles)

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	Unknown	1963-1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	Total 1963-2004
TOTAL length	6	328	54	45	65	54	106	103	64	99	(R) 143	88	89	(R) 133	54	(R) 102	(R) 140	(R) 54	(R) 82	(R) 132	78	89	105	2,205
Type I barriers^a	^d6	210	39	30	40	35	83	88	44	78	114	63	47	(R) 95	37	(R) 70	(R) 116	(R) 31	(R) 67	(R) 95	63	78	88	1,613
Type II barriers^b	0	114	14	14	24	16	8	8	19	18	18	21	16	32	15	31	23	(R) 18	(R) 11	(R) 18	13	4	14	471
All other types^c	N	4	1	1	1	3	15	7	1	3	(R) 11	4	26	(R) 6	2	(R) 1	1	(R) 5	(R) 4	(R) 19	2	7	3	121
Cost (2004 $ millions)	0	329	67	57	106	72	168	163	108	176	228	144	135	203	79	180	242	110	147	207	190	171	159	3,442

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

^a A Type I barrier is built on a new highway project or a physically altered existing highway.

^bA 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.

^dHave not been assigned a year of construction or a cost.

NOTES

Forty-five miles of barriers, while assigned a year of construction, cannot be assigned a cost.

California did not provide data for the years 1999 - 2004 and therefore these years may not be comparable with previous years.

SOURCE

U.S. Department of Transportation, Federal Highway Administration, Office of Environment and Planning, Highway Traffic Noise Barrier Construction Trends (Washington, DC: May 2006), tables 1 and 3.