[Code of Federal Regulations]
[Title 40, Volume 22]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR202.21]

[Page 82]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 202--MOTOR CARRIERS ENGAGED IN INTERSTATE COMMERCE--Table of Contents
 
        Subpart B--Interstate Motor Carrier Operations Standards
 
Sec. 202.21  Standard for operation under stationary test.

    (a) No motor carrier subject to these regulations shall operate any 
motor vehicle of a type to which this regulation is applicable which 
generates a sound level in excess of 88 dB(A) measured on an open site 
with fast meter response at 50 feet from the longitudinal centerline of 
the vehicle, when its engine is accelerated from idle with wide open 
throttle to governed speed with the vehicle stationary, transmission in 
neutral, and clutch engaged. This section shall not apply to any vehicle 
which is not equipped with an engine speed governor.
    (b) No motor carrier subject to these regulations shall operate any 
motor vehicle of a type to which this regulation is applicable which 
generates a sound level in excess of 85 dB(A) measured on an open site 
with fast meter response at 50 feet from the longitudinal centerline of 
the vehicle when its engine is accelerated from idle with wide open 
throttle to governed speed with the vehicle stationary, transmission in 
neutral, and clutch engaged. This paragraph shall not apply to any 
vehicle which is not equipped with an engine speed governor.

[39 FR 38215, Oct. 29, 1974, as amended at 51 FR 852, Jan. 8, 1986]