What is common to routes 47M, 47, 57, and 68 concerning recovery locations?

The correct choice highlights that routes 47M, 47, 57, and 68 all have designated recovery areas. These recovery locations are essential for bus operators, as they provide specific points to regain schedule adherence, manage operational delays, and allow for necessary breaks or vehicle checks. Having designated recovery areas ensures efficiency in the transit system, allowing each route to effectively manage passenger flow and driver needs while keeping buses on schedule.

The other options do not accurately reflect the specifics of these routes: while they may have different schedules or times they operate, they do not all recover at the same spot, nor do they lack recovery points. Each route's designated recovery areas are purposefully selected based on factors like traffic patterns and ridership, contributing to the overall operational effectiveness of the transit system.