Which Act mandated states to adopt standards for CMV drivers?

The Commercial Motor Vehicle Safety Act of 1986 is significant because it specifically aimed to improve highway safety and mandated states to adopt standards for commercial motor vehicle (CMV) drivers. This Act was pivotal in establishing consistent licensing standards across states, which led to better regulation of CMV drivers and enhanced safety on the roads.

By setting certain minimum standards for obtaining a commercial driver's license (CDL), the Act helped to ensure that all CMV drivers meet these essential safety criteria. This was critical in addressing the growing concerns around the safety of larger vehicles on highways and aimed to reduce the incidence of accidents involving CMVs. The Act laid the groundwork for improved training and testing requirements, making the roads safer for all users.

In contrast, the other acts mentioned either focus on broader transportation safety initiatives or do not directly pertain to the licensing and standards for CMV drivers, highlighting the unique and targeted focus of the Commercial Motor Vehicle Safety Act of 1986.