From why the feds are issuing threats now to the difference between commuter rail and light rail.
At issue are crossing gates that, in some instances, come down too early and stay down too long.
In its filing, Denver Transit Partners also urged the court to reject RTD’s counterclaims.
The filing paints a chaotic portrait of the months and years leading up to the A Line opening in April 2016.
The Denver Post reports a "safety critical software problem" at some crossings prompted the return of the guards.
The April 20 incident on the A Line that left 200 riders stranded dented the transit agencies' relationship, but decades-long deal will likely remain intact.
The board decried DTP’s lack of communication and questioned what steps the company would take to prevent such incidents in the future.
Internal disciplinary records obtained by CPR News show engineers have made dozens of serious mistakes in the last two years.
The hold-up is over the wireless system that controls the A, B and G lines’ crossing gates.
The PUC Chairman took issue with an RTD spokesman's comment about the regulatory process.