When two safety chains are used, must the ultimate combined breaking strength of each chain be equal to the gross weight of the towed vehicle(s) or would the requirements be met if the combined breaking strength of the two chains is equal to the gross wei

Section § 393.70: Coupling devices and towing methods, except for driveaway-towaway operations.

Question 2: When two safety chains are used, must the ultimate combined breaking strength of each chain be equal to the gross weight of the towed vehicle(s) or would the...

Is there a minimum number of fasteners required to fasten the upper fifth wheel plate to the frame of a trailer?

Section § 393.70: Coupling devices and towing methods, except for driveaway-towaway operations.

Question 1: Is there a minimum number of fasteners required to fasten the upper fifth wheel plate to the frame of a trailer?

Guidance: The FMCSRs do not...

What standards under the FMCSRs must be met when a liquid fuel tank is repaired or replaced?

Section § 393.67: Liquid fuel tanks.

Question 3: What standards under the FMCSRs must be met when a liquid fuel tank is repaired or replaced?

Guidance: A replacement/repaired tank must meet the applicable standards in § 393.67.

Do the FMCSRs specify a particular pressure relief system?

Section § 393.67: Liquid fuel tanks.

Question 2: Do the FMCSRs specify a particular pressure relief system?

Guidance: No, but the performance standards of § 393.67(d) must be met.

May a properly vented fuel cap be used on a fuel tank equipped with another fuel venting system?

Section § 393.67: Liquid fuel tanks.

Question 1: May a properly vented fuel cap be used on a fuel tank equipped with another fuel venting system?

Guidance: Yes (see § 393.3).

Must a motor vehicle that meets the definition of a "commercial motor vehicle" in § 390.5 because it transports hazardous materials in a quantity requiring placarding under the Hazardous Materials Regulations (49 CFR parts 171-180) comply with the fuel

Section § 393.65: All fuel systems.

Question 2: Must a motor vehicle that meets the definition of a ‘‘commercial motor vehicle’’ in § 390.5 because it transports hazardous materials in a quantity requiring placarding under the Hazardous Materials Regulations (49...

Medical Qualification FAQ – FOREIGN Medical certificate – FAQ2

Medical Qualification FAQ – FOREIGN Medical certificate – FAQ2

Description: FAQ

FAQ2:  I operate a CMV in the United States but reside outside of the United States. Can I use my foreign medical certificate?

 A2: ...

Medical Qualification FAQ – Waivers – Q3

Medical Qualification FAQ – Waivers – Q3

Description: DETERMINING THAT LIMB IMPAIRED CANADIAN DRIVER CAN OPERATE A CMV

FAQ3:  How will enforcement officials know that a limb-impaired Canadian driver has demonstrated their ability to...

Medical Qualification FAQ – Waivers – Q5

Medical Qualification FAQ – Waivers – Q5

Description: FAQ

FAQ5:  Will a U.S. driver currently holding a SPE certificate issued by the FMCSA for a limb impairment be able to drive in Canada?

 A5:  The FMCSA changed...

May a fuel fill pipe opening be placed above the passenger floor level if it is not physically within the passenger compartment?

Section § 393.65: All fuel systems.

Question 1: May a fuel fill pipe opening be placed above the passenger floor level if it is not physically within the passenger compartment?

Guidance: Yes. In addition, the fill pipe may intrude into the passenger...