The MBTA said April ridership was up 4.4% over April of last year, and that bus ridership topped 400,000 weekday rides for the first time ever. Officials credited the widespread use of smart-phone apps that let riders know when the next bus is coming, along with an inproving economy.

Green Line ridership led the subway lines with an 8.2% ridership increase.

T officials have factored in a possible ridership decrease starting July 1, when fares increase.