Trans 405.02(4)
(4) “Noise barrier" means any device, which reduces the transmission of highway traffic noise from a highway to an adjacent receptor, including, but not limited to, earth berms, walls made from timber, metal, concrete, or any combination thereof.
Trans 405.02(5)
(5) “Noise level" means the sound level obtained through use of A-weighting characteristics. The unit of measure is the decibel (dB), commonly referred to as dBA when A-weighting is used.
Trans 405.02(6)
(6) “Receptor" means an outdoor place where frequent human use occurs and a lowered noise level would be of benefit.
Trans 405.02(7)
(7) “Residence" means the official location of a household.
Trans 405.02(8)
(8) “Retrofit project" means a proposed project for the construction of noise barriers along an existing highway.
Trans 405.02 History
History: Cr.
Register, August, 1989, No. 404, eff. 9-1-89.
Trans 405.03(1)
(1) The provisions of this chapter shall apply to all freeways and expressways under the jurisdiction of the department under ss.
59.84 and
84.295, Stats.
Trans 405.03(2)
(2) This chapter is to be applied so as to avoid conflict with obligations of the department, under ss.
84.015 and
84.03, Stats., to comply with criteria and standards of federal agencies for obtaining and using federal funds.
Trans 405.03 History
History: Cr.
Register, August, 1989, No. 404, eff. 9-1-89;
correction in (1) made under s. 13.93 (2m) (b) 7., Stats., Register, November, 2000, No. 539.
Trans 405.04(1)
(1) Noise barriers shall be designed to provide protection only to the ground floor of abutting buildings and not other parts of the buildings.
Trans 405.04(2)
(2) For the department to consider a site for construction of a noise barrier, the site shall meet the following criteria:
Trans 405.04(2)(a)
(a) For retrofit projects, a receptor shall be exposed to existing noise levels which equal or exceed the levels in Table 1.
Trans 405.04(2)(b)
(b) For new highway projects, a receptor shall have predicted future noise levels which equal or exceed the levels in Table 1 or which exceed existing noise levels by 15 decibels or more.
Trans 405.04(2)(c)
(c) A noise barrier protecting a receptor shall reduce noise levels by a minimum of 8 decibels.
Trans 405.04(2)(d)
(d) The total cost of a noise barrier may not exceed $30,000 in 1988 dollars per abutting residence. The department may annually adjust this $30,000 maximum figure up or down based on changes in the construction price index after 1988. Other land use categories shall be analyzed on a site specific basis to determine cost effectiveness.
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See PDF for table 
Trans 405.04 History
History: Cr.
Register, August, 1989, No. 404, eff. 9-1-89
; reprinted to correct error in table, Register, November, 2000, No. 539.
Trans 405.05
Trans 405.05 Local participation. The department shall ensure local participation in the siting of noise barriers through the following:
Trans 405.05(1)
(1) The department shall hold one or more informational meetings, in a location convenient to the locality to be affected by the siting, to provide an opportunity for local participation in the selection and development of the noise barrier installation project. The department shall arrange for published notice of each informational meeting. The department shall also give direct written notice of each informational meeting to each person owning real property or leasing a residence in the following locations:
Trans 405.05(1)(a)
(a) Within 500 feet in any direction from the proposed noise barrier or
Trans 405.05(1)(b)
(b) Within the areas directly behind the proposed noise barrier and directly across the highway from the proposed noise barrier where the highest hourly traffic noise level equals or exceeds 67 decibels.
Trans 405.05(2)
(2) For a proposed noise barrier project to be considered for construction, the local government, prior to completion of final design of a proposed noise barrier, shall furnish the department with:
Trans 405.05(2)(b)2.
2. Would reasonably eliminate the need for state-funded noise barriers in highway rights-of-way adjacent to future developments.
Trans 405.05 History
History: Cr.
Register, August, 1989, No. 404, eff. 9-1-89.
Trans 405.06
Trans 405.06 Program. The department, upon receiving a community request for a noise barrier project, shall evaluate and program eligible retrofit noise barrier projects in the highway programming process. Factors considered in this process shall include, but are not limited to, cost of the project, date of adjacent development along the proposed site, traffic noise levels, number of benefiting receptors, community acceptance of the proposed noise barrier, and predicted noise level reduction.
Trans 405.06 History
History: Cr.
Register, August, 1989, No. 404, eff. 9-1-89.
