CDL Restrictions | Department of Revenue - Motor Vehicle https://dmv.colorado.gov/cdl-restrictions

"E - No Manual Transmission CMV: This restriction is placed on an individual's CDL if the vehicle that the CDL skills test was taken in has an automatic transmission"

アメリカの商用トラックの免許のAT限定、正式にはE-Restrictionって言うっぽさ・・・？＞＜