Three Massachusetts transit affordability initiatives are changing what some Boston-area riders pay this fall. Two pilots began September 1, while a separate Commuter Rail discount was extended. The biggest everyday change is a more flexible two-hour transfer window.

More transfers inside two hours

Under the pilot, riders can make multiple transfers among subway, local bus, express bus and participating ferry services during a two-hour window while paying the applicable fare for the trip. Riders must use the same payment method throughout the journey. That matters for trips that previously required an additional fare after more than one transfer.

Express buses cost less

The express-bus pilot reduces the full fare from $4.25 to the local-bus fare of $1.70. The reduced fare moves from $2.10 to $0.85. For a commuter taking ten round trips in a month, the difference can be meaningful, but riders should confirm that their route and payment method qualify.

Commuter Rail savings continue

The state also extended the 50-percent discount on monthly Commuter Rail passes through the fall. A related program allows a monthly-pass holder to bring another rider for a reduced fare on eligible trips.

Read the Commonwealth's complete fare-pilot announcement for the official terms, dates and eligibility details.

The simplest habit is to tap or scan with the same payment method for an entire trip and check the official trip planner before leaving. A cheaper fare does not override construction diversions or service alerts.