Test prep
CDL Hazmat Endorsement Requirements: What to Expect
A study-focused rundown of what the CDL hazmat (H) endorsement involves: the knowledge test, the TSA security threat assessment, eligibility, fees, and renewal.
Lawrence Arya··6 min
Test prep
Hazmat Endorsement Disqualifying Offenses (TSA Rules)
Which offenses can block a CDL hazmat endorsement, the difference between permanent and interim disqualifiers, and where the TSA rules live.
Lawrence Arya··5 min
Test prep
The X Endorsement Explained (Tanker Plus Hazmat)
What the CDL X endorsement is, how it combines the tank vehicle and hazmat endorsements, and what it takes to earn it. A study guide for CDL drivers.
Lawrence Arya··5 min
Test prep
TWIC vs Hazmat Endorsement: What Is the Difference?
TWIC and the CDL hazmat endorsement both involve a TSA background check but serve different purposes. Here is how they differ and how they overlap.
Lawrence Arya··5 min
Test prep
What to Expect on the CDL Hazmat Test (Format and Topics)
What the CDL hazmat knowledge test looks like: the format, the topics it covers, where you take it, and why details like question count vary by state.
Lawrence Arya··5 min
Test prep
Who Regulates Hazmat? PHMSA, FMCSA, TSA, and More
Which agencies regulate hazardous materials transport and what each one does, from PHMSA writing the rules to FMCSA enforcing them on the road.
Lawrence Arya··5 min