7 Endorsements
1 Written test each
HZ Requires TSA background check

Not all endorsements apply to every CDL class. Use the CDL Selector to find what you need.

HZ
⚠️ Federal Required

Hazardous Materials

When It's Required

Required to transport any quantity of hazardous materials that require placarding under federal HazMat regulations.

What to Study

Study shipping papers, placard and label selection, safe loading and segregation, emergency response procedures, and security-awareness requirements under federal law.

Hazardous Materials in Vermont

  • Maple and specialty food logistics: cleaning agents, batteries, and other placarded retail freight
  • Granite and stone: roofing, coatings, and compressed-gas deliveries to job sites
TK
🛢️ Common Add-on

Tank Vehicles

When It's Required

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

Study liquid surge and baffled tanks, outage allowances, inspections, high-center-of-gravity handling, and rollover prevention strategies.

Tank Vehicles in Vermont

  • Dairy and agriculture: milk tankers running farm-to-plant routes
  • Maple and specialty food logistics: beverage, dairy, and food-grade liquid tankers
PS
🚌 Passenger Ops

Passenger

When It's Required

Required for commercial vehicles designed to carry 16 or more passengers including the driver: charter buses, transit coaches, and similar vehicles.

What to Study

Study passenger safety protocols, controlled loading and unloading, emergency door operation, on-road passenger management, and distracted-driving rules.

Passenger in Vermont

  • Tourism and ski resort supply: motorcoaches, hotel shuttles, and airport buses
  • Transit agencies, charter companies, and church or community buses across Vermont
SB
🚐 School Bus

School Bus

When It's Required

Required for any driver transporting school-age students in a vehicle classified as a school bus under federal or state law.

What to Study

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 Vermont

  • Vermont school districts and their contractors: every route driver needs S plus P
  • Activity and athletics trips, which use the same S-endorsed drivers
DT
🚚 Multi-Trailer

Doubles & Triples

When It's Required

Required to pull double or triple trailers where permitted by state law. Common in regional and long-haul freight operations.

What to Study

Study coupling and uncoupling double and triple combinations, pull-out stability, off-tracking behavior, full combination inspections, and safe following distance.

Doubles & Triples in Vermont

  • Maple and specialty food logistics: twin 28-foot LTL trailer sets on the interstates
AB
🛑 Most Required

Air Brakes

When It's Required

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

Study air brake components, dual-circuit systems, inspection procedures, warning devices, pressure gauges, and stopping distance at highway speeds.

Air Brakes in Vermont

  • Granite and stone: dump trucks, mixers, and flatbed tractors on construction routes
  • Almost every Class A and Class B vehicle in Vermont; skip this test and your CDL carries an L restriction
CV
🚛 Class A Essential

Combination Vehicles

When It's Required

Essential for Class A drivers operating tractor-trailers, lowboys, and other multi-unit combinations over federal weight thresholds.

What to Study

Study coupling and uncoupling procedures, air line connections, trailer handling characteristics, off-tracking, and full combination vehicle inspections.

Combination Vehicles in Vermont

  • Dairy and agriculture: refrigerated dairy loads to processors and distributors
  • Maple and specialty food logistics: regional and over-the-road tractor-trailer distribution runs
  • Granite and stone: flatbed and step-deck loads of steel, lumber, and building materials
  • Tourism and ski resort supply: event and production freight moving between venues

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