Skip to Main Content
<< Back | Return to Main COMAR Search Page

17 records match your request.

FileAbstract
11.14.07.00.htm 11.14.07.00. Title 11 DEPARTMENT OF TRANSPORTATION Subtitle 14 MOTOR VEHICLE ADMINISTRATION ― VEHICLE INSPECTIONS Chapter 07 Noise Abatement Program Authority: Transportation Article, §12-104(b) 22-601, 22-603, 22-605, 22-607, 22-608, 22-610, Annotated Code of Maryland
11.14.07.01.htm 11.14.07.01. 01 Promulgation of Regulations for Maximum Sound Level Limits.. A. The Transportation Article, §22-601, Annotated Code of Maryland, authorizes the Administrator, by regulation, to adopt maximum sound level limits for motor vehicles operated on the highways of the State.B. The Transportation Article, §22-603, Annotated Code of Maryland, authorizes the Administrator and the Maryland State Police to jointly promulgate regulations for the administration and enforcement
11.14.07.02.htm 11.14.07.02. 02 Definitions.. A. In this chapter, the following terms have the meanings indicated.. B. Terms Defined.. 1) "dB(A) means the accepted abbreviation for A-weighted sound level in decibels.. 2) "GCWR" means gross combination weight rating.. 3) "GVWR" means gross vehicle weight rating.. 4) "Ground cover" means any various low, dense growing plants, such as ivy, myrtle, low weeds, or brush.5) "Hard test site" means any test site having the ground surface covered w
11.14.07.03.htm 11.14.07.03. 03 Applicability.. A. Noise Measurement. Regulations .04 through .12 apply to the measurement of noise of any:. 1) Motor vehicle while in motion;. 2) Stationary motor vehicle equipped with an engine governor; and. 3) Stationary motor vehicle without an engine governor.. B. Noise Exemptions. These regulations do not apply to:. 1) The sound generated by a horn or other warning device when operated under the provisions of the Transportation Article, §22-401, Annotated Code of Maryland;
11.14.07.04.htm 11.14.07.04. 04 Noise Limits for Vehicles.. A person may not operate or permit to be driven on a highway of this State any motor vehicle or combination of vehicles at any time or at any speed, under any conditions of grade, load, acceleration, or deceleration in a manner which would exceed the sound level limits specified in Table 1, 2, or 3 for the category of vehicle. Measurements shall be made in accordance with the procedures and measuring device specifications adopted by the Administr
11.14.07.05.htm 11.14.07.05. 05 Standard Measurement Site for Highway Operation of all Vehicles over 10,000 Pounds GVWR and GCWR.. A. Moving Vehicle Measurement Procedures.. 1) Measurement shall be made at a measurement site which is adjacent to, and includes, a portion of a traveled lane of a public highway. A microphone target point shall be established on the centerline of the traveled lane of the highway and a microphone location point shall be established on the ground surface 50 feet (15.
11.14.07.06.htm 11.14.07.06. 06 Measurement Site Stationary Operation ― Other Vehicles.. A. 10,000 Pounds or Less GCWF or GCWR. The same procedures as described in Regulation .05B of this chapter are used.B. Motorcycle. The same procedures as described in Regulation .05B of this chapter are used..
11.14.07.07.htm 11.14.07.07. 07 Non-Standard Site Highway Operation for All Vehicles over 10,000 Pounds GVWR or GCWR.. A. If the distance between the microphone location point and the microphone target point is a distance other than 50 feet (15.2m) this same distance will be used for the radius of the microphone location point and the microphone target point. The measurement site will be the area within both radii. See Figure 3.B. Non-Standard Measurement Site Highway Operations.. Figure 3..
11.14.07.08.htm 11.14.07.08. 08 Site Requirements: Highway Operation for All Vehicles over 10,000 Pounds GVWR or GCWR.. A. Measurement Site.. 1) The measurement site shall be an open site, essentially free of large sound reflecting objects and not closer than 200 feet between the microphone target point and a tunnel or underpass.2) The following objects may be within the site including the triangular measurement area:. a) Small cylindrical objects such as fire hydrants or telephone or utility poles;.
11.14.07.09.htm 11.14.07.09. 09 Site Requirements Stationary Tests ― Other Vehicles.. A. 10,000 Pounds or Less GVWR or GCWR. The same procedures as described in Regulation .05B of this chapter are used.B. Motorcycles. The same procedures as described in Regulation .05B of this chapter are used..
11.14.07.10.htm 11.14.07.10. 10 Sound Level Measurement Equipment.. A. Sound Level Meter. A precision sound level meter meeting all the requirements of American National Standards Specification for Sound Level Meters ANSI S1.4―1971, or later revision, for a type 1 or a type S-1A instrument shall be used. The sound level meter shall be calibrated and certified annually with a method traceable to the U.S. National Bureau of Standards to verify its performance within design tolerances.B. Acoustical Calibrator..
11.14.07.11.htm 11.14.07.11. 11 Sound Level Equipment Operation for Measuring Vehicle Noise.. A. The microphone of a sound level measurement system for all moving vehicle measurements for vehicles over 10,000 pounds GVWR and GCWR shall be located at a height of not less than 2 feet (6m) or more than 6 feet (1.8m) above the plane of the roadway surface and not less than 3-1/2 feet (1.1m) above the surface on which the microphone stands. The preferred microphone height on flat terrain is 4 feet (1.2m)
11.14.07.12.htm 11.14.07.12. 12 Records.. A. The operator shall keep written and signed records on prescribed forms.. B. The forms shall include at least the following:. 1) Location of measurement site and posted speed, if applicable;. 2) Date and time of day of the measurements;. 3) Name of operator making the measurements;. 4) Identifying numbers of measurement equipment; and. 5) For every violation observed, a description of vehicle, the lane of operation (except for stationary vehicle measurements)
11.14.07.13.htm 11.14.07.13. 13 Sound Level Limits.. A. A person may not sell, offer for sale, distribute, or lease a new motor vehicle that produces a sound level that exceeds the sound level limit specified in Table 5 for the category of vehicle when measured under the moving vehicle test site procedures established by Regulation .14 of this chapter. Compliance with the sound level limits established in this chapter may not be construed as limiting or precluding the enforcement of other regulatio
11.14.07.14.htm 11.14.07.14. 14 New Motor Vehicles.. A. All moving vehicle tests shall be conducted in accordance with the recommended practices referenced in §B, C, and D of this regulation. All stationary vehicle tests shall be in accordance with the recommended practices of ISO 5130 1982 E.B. The maximum sound emission test procedure for vehicles having a GVWR GCWR in excess of 10,000 pounds shall be that contained in the SAE Standard J986b, Exterior Sound Level for Heavy Trucks and Bus
11.14.07.15.htm 11.14.07.15. 15 Manufacturer's Certification.. A. Each vehicle manufacturer or distributor of vehicles of a type subject to this chapter, that are to be sold or distributed in this State, shall certify to the Administrator that all vehicles to be sold or distributed are in compliance with the provisions of this chapter.B. The certification shall be:. 1) Filed annually;. 2) Filed before the date of introduction of a new model; and. 3) Accompanied by a list of models of the same mod
11.14.07.9999.htm 11.14.07.9999. Administrative History Effective date:. Regulations .01A, .02B, C, E, .03, and .04 adopted effective October 1, 1975 (2:22 Md. R. 1370). Regulations .01B, .05―08 adopted effective December 24, 1975 (2:29 Md. R. 1741). Regulations .01C, .02, .09―11 adopted effective October 1, 1975 (2:22 Md. R. 1371). Regulations .07, .09, and .11 amended effective November 11, 1977 (4:24 Md. R. 1806) ―. Chapter revised effective April 9, 1984 (11:7 Md. R. 626) Annotation: COMAR
<< Back | Return to Main COMAR Search Page