Table 6
Noise Barrier Construction Material Average Unit Cost By Year

Material Average Unit Cost
(2004 $/Square Foot)
Year	Concrete	Block	Wood	Metal	Berm	Brick	Combination	Absorptive
1963-1993	24	21	18	17	5	25	17	29
1994	21	19	16	17	8	31	23	20
1995	21	20	11	15	6	17	26	16
1996	17	21	15	0	13	0	23	28
1997	25	11	38	0	2	0	26	0
1998	22	15	19	12	5	0	15	30
1999	27	20	22	43	3	0	26	19
2000	23	35	19	0	7	0	13	33
2001	23	22	18	16	0	29	10	17
2002	32	29	16	13	4	39	17	24
2003	24	26	20	18	4	0	4	20
2004	21	25	13	14	0	0	11	21
ALL	24	21	18	16	6	25	17	24

NOTE: Square feet of noise barriers constructed with 'Other' materials - 1,811,622
Costing approximately - $29 per square foot.