The two lines, which opened in 2016, have had significant technical issues with crossing arms that come down too early and stay down too late.
Regional Transportation District (RTD)
How many Colorado lawmakers does it take to fix a bill-drafting error? All 100 of them.
RTD's General Manager Dave Genova tells Colorado Matters he's disappointed with progress.
State regulators have denied a request that could have eventually led to the opening of the long-delayed G Line commuter train.
Aurora police say the driver may have pulled in front of the oncoming train intentionally.
The emails show disagreement between the two agencies over basic facts and how to communicate them to the public.
The transit district received another 90-day wavier as it continues trying to fix software and hardware issues.
A federal waiver that's allowed the trains to keep rolling while work continues expires this week. But officials say they anticipate getting another.
RTD's University of Colorado A Line and its B Line have been granted a 90-day extension to fix faulty crossing gates. People have been stationed at the crossings for months to monitor the gates.