Which lines are included in route pairing 8?

Route pairing 8 includes the Fox Chase Line and the Chestnut Hill West Line. This pairing allows for coordinated scheduling and service management between these two lines, creating efficiency in route planning and improving the overall service to passengers. Each of these lines serves distinct regions but is strategically paired to better manage and utilize resources.

The other choices represent different lines that do not form the specific pairing categorized as route 8. The defined structure of route pairings is essential in transit operations, as it enables better service orchestration across the network. Understanding these pairings helps in operational planning and ensures streamlined service across multiple lines within the transit system.