RTD says to expect delays on the A-line Wednesday afternoon.

The delays are between 15 to 20 minutes, according to RTD, and are due to crossing gate issues. They’re expected to last until around 1:30 p.m.

RTD says several crossings were experiencing problems, meaning the trains were stopping more than usual.

The A-line between Union Station and Denver International Airport has been plagued with delays since it opened in April.

The Federal Railroad Administration granted RTD a 90-day extension to fix the crossing gates on the A and B lines earlier this month.

The A-line has operated under a temporary waiver from the FRA since it opened on April 22.