State context
CDL requirements in Iowa
The CDL knowledge tests are federal. What Iowa changes is the process around them — where you apply, what it costs, how the skills test is scheduled, and whether longer combination vehicles are permitted at all.
Take a 10-question federal diagnosticLonger combination vehicles in Iowa
Iowa is one of 21 jurisdictions that permit LCV operation. Doubles are permitted. Triples are permitted. Scope: border.
Routes: Sioux City border access only
Practise the LCV knowledge test →
Source: cfr-658-appendix-c · reviewed 2026-07-30
Fees and scheduling
These vary by state and we do not publish a figure we have not read from Iowa's own licensing agency. Check the agency directly before you budget or book.