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May a system such as ‘‘driveline brakes’’ be used as an emergency brake provided it complies with the requirements of § 393.52?

Document
FMCSA-VEH-393.40-Q01.cm_.docx (22.22 KB)

Section § 393.40: Required brake systems.

Guidance Q&A

Question 1: May a system such as ‘‘driveline brakes’’ be used as an emergency brake provided it complies with the requirements of § 393.52?

Guidance: Yes. CMVs which were not subject to the emergency brake requirements of FMVSS Nos. 105 or 121 may use ‘‘drive line brakes’’ provided those vehicles meet the requirements of § 393.52.

Regulatory Topic: “Driveline brake” as emergency brakes
Effective Date: Sunday, May 4, 1997
Issued Date: Friday, April 4, 1997