CDL · Hazardous Materials · 4 min read
Identifying Hazard Classes and Materials
- Identify the distinct roles of the shipper, the carrier, and the driver described in Section 9.2 of the CDL manual.
- Explain carrier and driver duties before transport, including verifying descriptions, markings, labels, vehicle placarding, and refusing leaking shipments.
- Describe the driver's en route responsibilities regarding safe transit, following special rules, keeping documents in the proper place, and reporting accidents or incidents.
The Hazardous Materials Transport Chain: Shippers and Carriers
Section 9.2 outlines who does what in hazardous materials transportation. Safely moving hazardous materials across the country requires a coordinated effort between several parties. Every role in the transportation chain has defined duties established by safety regulations. Understanding who does what helps commercial drivers recognize their personal legal obligations and understand what other parties must do before freight ever reaches a commercial motor vehicle.
The first key participant in this chain is the shipper. The shipper sends products from one place to another. A shipper may send products by truck. Regardless of which of these transport methods is used, the shipper initiates the movement of the goods from the point of origin.
The second key participant is the carrier. While the shipper originates the freight, the carrier is the operating entity responsible for taking that shipment from the shipper across the transportation network to its final destination. Within this framework, specific rules govern how both shippers and carriers handle their tasks to ensure public safety.
| Role | Primary Function in Transportation |
|---|---|
| Shipper | Sends products from one place to another by truck, rail, vessel, or airplane. |
| Carrier | Takes the shipment from the shipper to its destination. |
| Driver | Operates the vehicle, verifies cargo preparation, transports safely and without delay, and follows special rules. |
Common mistakes
- Assuming a driver can accept a leaking container if the leak appears minor. The driver must refuse leaking packages and leaking shipments; packages that are leaking must not be transported and shipments that are leaking must not be accepted.
- Believing that checking shipment descriptions, markings, and labels can wait until after the vehicle is on the road. Checking shipment descriptions, markings, and labels must be done prior to transportation.
- Failing to maintain both shipping papers and emergency response information in the proper place during transport. Both must be kept in the proper place.
- Thinking the driver only reports an accident or incident if ordered by the carrier, forgetting that the driver reports accidents and incidents to the proper government agency when they occur while the driver is in physical control of the shipment.
Key points
- Section 9.2 outlines who does what in hazardous materials transportation, establishing the roles of the shipper, the carrier, and the driver.
- The shipper sends products from one place to another by truck, rail, vessel, or airplane.
- The carrier takes the shipment from the shipper to its destination, must check descriptions, markings, labels, and proper preparation prior to transportation, and must refuse improper shipments.
- Section 9.2.3 specifies driver responsibilities, which include verifying that the shipper properly identified, marked, and labeled hazardous materials.
- The driver must refuse leaking packages and leaking shipments, and the driver placards the vehicle when loading, if required.
- The driver must safely transport the shipment without delay, follow all special rules, and keep both shipping papers and emergency response information in the proper place during transport.
- The driver reports accidents and incidents involving hazardous materials to the proper government agency when they occur while the driver is in physical control of the shipment.
Practice this section
Explained CDL Hazardous Materials questions, no account needed. CDL Hazardous Materials practice test
The full lesson continues with 4 more sections with exam tips, audio in English and Spanish, 5 Check yourself questions and 18 flashcards.
- 1 month
$44.99$22.49 - 3 months
$131.99$65.99 - Lifetime
$269.99$134.99
One payment, no subscription.
See CDL plansAlready a member? Log in
Sample lesson: Understanding Hazard Terms and Symbols25 practice questions on this exam
Each CDL practice test has 25 original questions with the answers explained. No account needed.
Open the CDL practice testsOriginal lesson written for CDL practice · updated October 31, 2026. Exam names are trademarks of their owners; tests.global is not affiliated with them.