RTD said trains on the University of Colorado A Line to Denver International Airport were delayed Thursday morning by 15 to 30 minutes.
RTD said the delays were caused by minor issues with the Positive Train Control switch & Wayside signals.
RTD first warned users of the problem at 6:05 a.m.
About 80 minutes later, RTD said the signal issues had been fixed, but delays were still expected while the trains returned to their normal schedule.
A Line Update: Signal issues have been resolved. Expect additional minor delays as we get trains back to their normal schedule. @DENAirport
— RTD (@RideRTD) June 9, 2016
There have been several problems with the A-line since it opened at the end of April.
A power problem stopped the trains on May 16, 21, 23 and 24.
Last week, on Saturday, the A-line was delayed by crossing issues.
The Public Utilities Commission is requiring flaggers be stationed at each crossing around the clock, to help direct traffic in the event of a signal malfunction.
That requirement will remain in effect until the transportation agency’s new, first of its kind Positive Train Control system has been certified.
The commuter rail is designed to take passengers from downtown to the airport in 37 minutes, with six stops along the way. The line is 23 miles long. The fare is a flat rate of $9.
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