RITA | BTS | Table 4-56: Highway Noise Barrier Construction

Table 4-56: Highway Noise Barrier Construction

(Miles)

	Unknown^a	(R) 1963-1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	(R) 2001	2002	(R) 2003	(R) 2004	2005	2006	2007	Total 1963-2007
TOTAL length	6	491	54	106	103	64	99	143	88	(R) 90	133	54	102	140	54	82	133	78	92	107	86	113	96	2,506
Type I barriers^b	6	320	35	83	88	44	78	114	63	(R) 48	95	37	70	116	31	67	96	63	81	89	55	77	52	1,803
Type II barriers^c	0	167	16	8	8	19	18	18	21	16	32	15	31	23	18	11	18	13	4	14	10	13	17	511
All other types^d	N	4	3	15	7	1	3	11	4	26	6	2	1	1	5	4	19	2	7	4	21	23	27	184
Cost (2007 $ millions)	(R) 0	612	(R) 78	(R) 184	(R) 179	(R) 118	(R) 193	(R) 249	(R) 158	(R) 152	(R) 222	(R) 87	(R) 197	(R) 265	(R) 121	(R) 161	234	(R) 210	204	177	196	237	241	4,474

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

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

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

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

^d All other types of barriers are nonfederally funded.

NOTES

Fifty 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: August 2009), tables 5 and 7, and similar tables in earlier editions available at http://www.fhwa.dot.gov/environMent/noise/barrier/summary.htm as of Apr. 7, 2010.

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