What entity is responsible for regulating school bus stops in California?

The California Highway Patrol (CHP) is the entity responsible for regulating school bus stops in California due to its primary role in ensuring the safety of school transportation. The CHP establishes laws and regulations that govern how and where school buses can stop to safely load and unload students. This includes requirements for signage, visibility, and distance from intersections, which are all designed to protect students when entering or exiting the bus.

While the California Transportation Authority and the State Board of Education have roles in transportation and education, respectively, their functions do not specifically involve the regulation of school bus stop procedures. Local city councils may have some input or authority related to local traffic laws, but the overarching regulations for school bus stops fall under the jurisdiction of the CHP, making it the correct answer in this context.