Are the brakes on a vehicle towed in a driveaway-towaway operation or towed disabled vehicle required to be operable at all times?

Section § 393.48: Brakes to be operative.

Question 3: Are the brakes on a vehicle towed in a driveaway-towaway operation or towed disabled vehicle required to be operable at all times?

Guidance: Section 393.48(c) provides an exception to the requirement...

If a truck or truck tractor manufactured prior to July 25, 1980, and having 3 or more axles, has inoperable brakes on the front axle or some of the brake components are missing, would the vehicle be in violation of § 393.48?

Section § 393.48: Brakes to be operative.

Question 2: If a truck or truck tractor manufactured prior to July 25, 1980, and having 3 or more axles, has inoperable brakes on the front axle or some of the brake components are missing, would the vehicle be in violation...

How is the "Top 30%" OOS, Hazmat violations, and crash ratings calculated for an HMSP?

FAQ: 11 How is the "Top 30%" OOS, Hazmat violations, and crash ratings calculated for an HMSP?

Answer: The "top 30%" is a factor defined by examining ALL motor carriers registered for a USDOT Number. The factor establishes a threshold where in the total population of motor carriers, 30...

Do the permitting requirements apply to materials that have subsidiary hazards that come under the materials list, even if their primary hazard does not? Example: A Flammable Liquid, Class 3, is a subsidiary poison inhalation hazard.

FAQ 10: Do the permitting requirements apply to materials that have subsidiary hazards that come under the materials list, even if their primary hazard does not? Example: A Flammable Liquid, Class 3, is a subsidiary poison inhalation hazard.

Ansewr: Materials poisonous by inhalation...

Do the Hazardous Materials Safety Permit requirements apply to U.S. territories such as Puerto Rico?

FAQ 8: Do the Hazardous Materials Safety Permit requirements apply to U.S. territories such as Puerto Rico?

Answer: Yes. The HM Safety Permit requirements are enacted under the authority of the Hazardous Materials Law, which applies to U.S. Territories.

If a CMV manufactured on or after July 25, 1980 (see § 393.42) has brake components on the front axle, and the brakes are not operable, does the vehicle comply with § 393.48?

Section § 393.48: Brakes to be operative.

Question 1: If a CMV manufactured on or after July 25, 1980 (see § 393.42) has brake components on the front axle, and the brakes are not operable, does the vehicle comply with § 393.48?

Are government entities covered under the Hazardous Materials Safety Permit Regulations?

FAQ 7:  Are government entities covered under the Hazardous Materials Safety Permit Regulations?

Answer: No. Government entities do not fall under the definition of a motor carrier. Private contractors working for a government entity are considered motor carriers and are covered...

Does the term ‘‘rear wheels’’ include the tag axle on a bus/motorcoach?

Section § 393.44: Front brake lines, protection.

Question 1: Does the term ‘‘rear wheels’’ include the tag axle on a bus/motorcoach?

Guidance: Yes. The braking system on a bus/motorcoach must be constructed so that if any brake line to either front wheel...

ELD FAQ 71: ELDs Canada & Mexico FAQ – Technical Specifications – Q3

NOTE: This guidance was rescinded as unnecessary on March 10, 2022, because the information contained therein was readily available in existing guidance. See FMCSA-HOS-ELD-395-FAQ23.

FMCSA-HOS-ELD-395-FAQ71

Frequently...

Are tractor protection valves required by § 393.43(b), or may similar devices be used?

Section § 393.43: Breakaway and emergency braking.

Question 1: Are tractor protection valves required by § 393.43(b), or may similar devices be used?

Guidance: No. Similar devices may be used provided the devices meet the performance requirements of § 393...