Commercial Driver License Overview
To drive a ready mix concrete truck, you must have at least a Class B CDL license (you can also drive a concrete truck if you have a Class A CDL license).
Definition of Class A
For operation of a commercial motor vehicle. Any combination of vehicles with a Gross Vehicle Weight Rating (GVWR), actual weight, or registered weight over 26,000 pounds provided the GVWR, actual weight, or registered weight of the towed vehicle(s) is more than 10,000 pounds.
Definition of Class B
For operation of a commercial motor vehicle. Any single vehicle with a GVWR, actual weight, or registered weight over 26,000 pounds, or such vehicle towing a vehicle with a GVWR, actual weight, or registered weight of 10,000 pounds or less.
How to apply for a CDL – https://wisconsindot.gov/Pages/dmv/com-drv-vehs/cdl-how-aply/cdlapply.aspx
Link to a free CDL Test to give you an idea of what is expected – https://www.cdlknowledge.com/cdl-air-brake-test/
There are many technical colleges in Wisconsin that offer CDL programs, including: