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.
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.
A federal waiver that's allowed the trains to keep rolling while work continues expires this week. But officials say they anticipate getting another.
- The Federal Railroad Administration granted RTD a temporary waiver to keep the lines open while a crossing arm issue is being fixed. But that ends on Nov. 5.Read more
- Transportation officials have withheld more than $800,000 from the company that operates the route.Read more