What does 49 CFR 390.17 (Additional equipment and accessories) require?

Short answer

49 CFR 390.17 allows the use of additional equipment and accessories on commercial motor vehicles, as long as they do not decrease the safety of operation. The regulation does not prohibit the use of such equipment, provided it is not inconsistent with or prohibited by the subchapter.

The rule says

"Nothing in this subchapter shall be construed to prohibit the use of additional equipment and accessories, not inconsistent with or prohibited by this subchapter, provided such equipment and accessories do not decrease the safety of operation of the commercial motor vehicles on which they are used." (49 CFR 390.17)

In plain English

This regulation gives motor carriers flexibility to use additional equipment and accessories on their vehicles, as long as they do not compromise safety. Motor carriers should carefully evaluate any additional equipment or accessories before installing them on their vehicles.

What to do

• Review the subchapter to ensure the additional equipment or accessories are not prohibited.
• Assess the potential impact of the additional equipment or accessories on the safety of operation.
• Install and maintain the equipment or accessories according to the manufacturer's instructions and regulatory requirements.
• Regularly inspect the equipment or accessories to ensure they are functioning properly and not compromising safety.