The A-Line has been operating on a federal waiver since it opened a year ago.
RTD A Line passengers going to or from Denver International Airport were delayed Friday morning.
Denver transportation officials say they have been given another three months to solve technology problems at some railroad crossings.
The impact of the RTD A Line train shutting down has a ripple effect on passengers, businesses and bottom lines.
DENVER -- Another day of delays, ANOTHEfor passengers riding the A-Line between Union Station and Denver International Airport.
Cars regularly clog the bike lanes in front of Union Station.
Since the launch of University of Colorado A Line, the train to the plane has been plagued with delays and shutdowns.
About 80 train passengers had to be evacuated by firefighters after getting stuck on a bridge 50 feet above the ground.
The University of Colorado's A-Line train to DIA will have a security on board to check passenger's tickets.
Learn 11 secrets of the new Denver International Airport train line.