Part of every Green Line is down this week

State of play: Crews will work on making the Green Line's infrastructure compatible with an incoming fleet of new cars.

• Shuttle service will replace the Green Line at most stops and take affected passengers to the Orange Line at Back Bay Station.

Here's where the Green Line is closed:

• B: Government Center to Babcock Street. (The 57 bus will also run fare-free.)
• C: Government Center to Cleveland Center.
• D: North Station to Kenmore.
• E: North Station to the end of the line at Heath Street. (Use the 39 bus, which will be fare-free.)

Protip: Shuttle buses are accessible to people with disabilities, though some weekday buses will have coaches with lifts.

• On the C branch, the Saint Mary's Street, Kent Street and Brandon Hall stops won't have shuttle service.
• The B branch won't charge for rides above ground from Babcock Street to Boston College.
• Nor will the D branch at Kenmore and Riverside or at the above-ground stops west of Kenmore.

Be smart: Passengers on the Worcester Commuter Rail Line won't have to pay fare between Lansdowne and South Station, but regular fares remain for the rest of any trip.

• This doesn't apply to other Commuter Rail lines.