Illinois CDL Endorsements
Endorsements are add-ons to your Illinois CDL that authorize specific vehicle types or cargo. Each requires a separate knowledge test, taken through Illinois Secretary of State, and the endorsement codes are federal, so a Illinois endorsement is recognized in every state. With rail and intermodal freight, grain and agriculture, steel and metals shaping Illinois freight, the examples under each endorsement show where that endorsement pays off locally.
Not all endorsements apply to every CDL class. Use the CDL Selector to find what you need.
When It's Required in Illinois
In Illinois (IL), required to transport any quantity of hazardous materials that require placarding under federal HazMat regulations.
What to Study for the IL Test
For the Illinois (IL) Hazardous Materials test, study shipping papers, placard and label selection, safe loading and segregation, emergency response procedures, and security-awareness requirements under federal law.
Hazardous Materials in Illinois (IL)
- Rail and intermodal freight: placarded containers and ISO tanks coming through the ports
- Grain and agriculture: anhydrous ammonia and crop chemicals under placards
- Steel and metals: roofing, coatings, and compressed-gas deliveries to job sites
- Retail distribution: cleaning agents, batteries, and other placarded retail freight
When It's Required in Illinois
In Illinois (IL), required for vehicles designed to transport liquids or gases in a tank permanently or temporarily attached to the vehicle, with individual tank capacity of more than 119 gallons.
What to Study for the IL Test
For the Illinois (IL) Tank Vehicles test, study liquid surge and baffled tanks, outage allowances, inspections, high-center-of-gravity handling, and rollover prevention strategies.
Tank Vehicles in Illinois (IL)
- Rail and intermodal freight: ISO tank containers of chemicals and food-grade liquids
- Grain and agriculture: liquid fertilizer and anhydrous ammonia tanks for the growing season
- Retail distribution: beverage, dairy, and food-grade liquid tankers
When It's Required in Illinois
In Illinois (IL), required for commercial vehicles designed to carry 16 or more passengers including the driver: charter buses, transit coaches, and similar vehicles.
What to Study for the IL Test
For the Illinois (IL) Passenger test, study passenger safety protocols, controlled loading and unloading, emergency door operation, on-road passenger management, and distracted-driving rules.
Passenger in Illinois (IL)
- Transit agencies, charter companies, and church or community buses across Illinois
When It's Required in Illinois
In Illinois (IL), required for any driver transporting school-age students in a vehicle classified as a school bus under federal or state law.
What to Study for the IL Test
For the Illinois (IL) School Bus test, study student loading zones, stop-signal arm procedures, railroad crossing rules, mirror adjustment, emergency evacuation drills, and state-specific school bus regulations.
School Bus in Illinois (IL)
- Illinois school districts and their contractors: every route driver needs S plus P
- Activity and athletics trips, which use the same S-endorsed drivers
When It's Required in Illinois
In Illinois (IL), required to pull double or triple trailers where permitted by state law. Common in regional and long-haul freight operations.
What to Study for the IL Test
For the Illinois (IL) Doubles & Triples test, study coupling and uncoupling double and triple combinations, pull-out stability, off-tracking behavior, full combination inspections, and safe following distance.
Doubles & Triples in Illinois (IL)
- Rail and intermodal freight: twin-trailer LTL sets running the port and rail corridors
- Grain and agriculture: double grain hoppers at harvest where the state allows them
- Retail distribution: twin 28-foot LTL trailer sets on the interstates
When It's Required in Illinois
In Illinois (IL), required for any vehicle equipped with an air brake system, which covers most Class A tractor-trailers and many Class B straight trucks.
What to Study for the IL Test
For the Illinois (IL) Air Brakes test, study air brake components, dual-circuit systems, inspection procedures, warning devices, pressure gauges, and stopping distance at highway speeds.
Air Brakes in Illinois (IL)
- Steel and metals: dump trucks, mixers, and flatbed tractors on construction routes
- Almost every Class A and Class B vehicle in Illinois; skip this test and your CDL carries an L restriction
When It's Required in Illinois
In Illinois (IL), essential for Class A drivers operating tractor-trailers, lowboys, and other multi-unit combinations over federal weight thresholds.
What to Study for the IL Test
For the Illinois (IL) Combination Vehicles test, study coupling and uncoupling procedures, air line connections, trailer handling characteristics, off-tracking, and full combination vehicle inspections.
Combination Vehicles in Illinois (IL)
- Rail and intermodal freight: container drayage between the ports, rail ramps, and warehouses
- Grain and agriculture: grain hoppers from elevators to processors and terminals
- Steel and metals: flatbed and step-deck loads of steel, lumber, and building materials
- Retail distribution: regional and over-the-road tractor-trailer distribution runs
Not sure which Illinois CDL endorsements you need?
Answer a few questions about your vehicle and operation, and the Illinois CDL Selector Tool pinpoints the endorsements you need in Illinois.