In which year was control over interstate motor carrier safety transferred to the U.S. Department of Transportation?

Answer: B — 1967

The transfer of control over interstate motor carrier safety to the U.S. Department of Transportation occurred in 1967. This significant shift aimed to consolidate various transportation-related functions under the newly created department, enhancing focus on safety regulations and enforcement. The establishment of the Department of Transportation marked a pivotal moment in ensuring that the oversight of interstate motor carriers was centralized, allowing for more coordinated safety policies and procedures. This transition laid the groundwork for ongoing advancements in transportation safety and regulation that would follow in subsequent decades.