State context
CDL requirements in Illinois
The CDL knowledge tests are federal. What Illinois 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 Illinois
Illinois does not permit LCV operation. Every other jurisdiction prohibits LCVs. The 1991 ISTEA freeze bars any state from adding routes or raising LCV weights, so a driver in a non-listed state cannot obtain LCV authority there at all — tell them that rather than sell them a practice 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These vary by state and we do not publish a figure we have not read from Illinois's own licensing agency. Check the agency directly before you budget or book.
Illinois CDL study path
If you are looking for an Illinois CDL practice test or an Illinois DMV CDL practice test, use our General Knowledge CDL practice testto review federal topics.
For the Illinois Secretary of State CDL license process, including how to get a Class B license in Illinois, check the current agency information below.
Official source: Illinois Secretary of State CDL and CLP information ↗ · reviewed 2026-09-22