According to 9News:
Emergency repairs to the train to the gates at Denver International Airport (DIA) are now complete, but they're still running at a reduced capacity after an incident early in the morning damaged about 100 feet of rail.
A DIA spokesperson said at 10 a.m. they're working to increase capacity on the train system, but it would likely take "several hours" for operations to return to normal.
It's recommended that passengers give themselves more than two hours extra time to get to their concourses. If passengers’ flights leave from Concourse A, they're encouraged to use the A-Bridge Security Checkpoint.
Numerous people reached out to 9NEWS Friday morning and described extremely long security lines. They were so long people were waiting outside.