What report summarizes crew availability for bus operators?

The st 40 report is designed specifically to summarize crew availability for bus operators. This report provides crucial information regarding the staffing levels and the scheduling of bus operators, ensuring that there are enough qualified personnel assigned to operate the buses on their respective routes. The effective management of crew availability is vital for maintaining service reliability and efficiency in public transportation systems.

The other options do not serve the same purpose. The st 30 report typically involves different operational metrics unrelated to crew availability. The Daily Operational Report focuses more broadly on the day's operations, including ridership numbers and operational incidents but does not specifically summarize crew availability. The Safety Compliance Report is concerned with adherence to safety regulations and protocols, which, while important, does not provide direct information on crew availability.