How do SEPTA's regional rail fares differ from bus fares?

The distinction between SEPTA's regional rail fares and bus fares is primarily based on how fares are structured relative to travel. Regional rail fares typically operate on a distance-based model, meaning that the fare increases with the length of the journey. This system is designed to account for the varying costs associated with longer distances and the different levels of service provided in regional rail compared to bus services.

Bus fares, on the other hand, are generally set at a flat rate, regardless of how far a passenger is traveling within the bus service area. This flat rate simplifies fare collection and makes it easier for passengers to know the cost of a trip in advance.

So, the correct answer highlights that regional rail fares are determined by the distance traveled, reflecting a different pricing strategy that contrasts with the flat fare system used for buses. This structure allows for a more equitable approach to fare pricing in relation to the service provided.