What card does Maryland accept in place of the hazmat background check?
Maryland accepts TWIC cards for the hazmat background check requirement. A knowledge test is still required when updating a TWIC.
Maryland · MDChange state
Free Maryland (MD) CDL Hazardous Materials practice test 2026
H endorsement: placarding, shipping papers and the segregation table.
What’s different in Maryland
Most Hazardous Materials questions are the same federal material in every state. 2 questions in the app are written for Maryland alone, from the Maryland Commercial Driver's License Manual (MDOT MVA).
Two Maryland questions, answer shown
A driver transfers a CDL with a hazmat endorsement to Maryland after completing a TSA check in the old state. What does Maryland require?
Maryland law requires every out-of-state hazmat holder to complete a new TSA threat assessment in Maryland, even if one was done before. Maryland accepts a TWIC card for the background check.
A sample question
One example, answer shown. Practicing the rest happens in the app.
Except for bulk packaging, hazard classes listed in Table 2 require placards only when the total amount transported reaches:
Table 2 materials need placards once the aggregate gross weight, including packaging, reaches 1,001 pounds. Table 1 materials must be placarded in any amount.