In 2018, two separate issues caused numerous delays and cancellations with many trains replaced by buses. An Amtrak track maintenance project required single-tracking of sections of the line, and ConnDOT lacked sufficient functional locomotives as the aging fleet was sent out for refurbishment. Three weekday round trips were reverted from bus to train in January 2019 when one locomotive returned from refurbishment, though additional issues were expected during a second summer of track work in 2019. Full service was restored on August 5, 2019. By that time, ridership had fallen by 25%, averaging 1,340 weekday riders and 767 weekend riders.