What does the "K" restriction signify for a CDL holder?

The "K" restriction signifies that the Commercial Driver's License (CDL) holder is permitted to operate a commercial motor vehicle (CMV) only within the boundaries of a single state—this is known as intrastate driving only. This restriction is generally applied to drivers who may not qualify for interstate driving due to various reasons, often related to specific eligibility requirements.

In particular, having a "K" restriction indicates that the driver is not authorized to cross state lines while operating a commercial vehicle, which can be crucial for compliance with various federal regulations and safety protocols that apply to interstate commercial driving. This helps ensure that individuals are operating primarily within the laws and regulations set forth by their state of residence, thereby maintaining safety standards and accountability.