The train that takes people to and from the concourses at Denver International Airport experienced delays for a second time on Wednesday due to technical problems. As of 10:55 a.m. the trains were back up and working to catch up on all the delays.

Tech issues slowed the train down twice, which also backed up all security screenings at the airport Wednesday morning, officials say.

Heath Montgomery, a DIA spokesperson, said a sensor issue on part of the track was to blame.

He said a "faulty sensor" indicated the train was on the track when it wasn't, meaning the train couldn't run in an automated way, and instead drove through the sensor problem area.

For a brief moment, all TSA screenings were at the A Bridge checkpoint, but all north and south checkpoints weve reopened as of 10:45 a.m.

Expect slowdowns due to the train issue at all checkpoints; the A Bridge checkpoint is at capacity.

The airport suggests you arrive early for your flight.

DIA is expecting enough passengers Wednesday to fill Sports Authority Field at Mile High 2.3 times.

The airport is always a busy place but this week is expected to be the busiest of the year. About 178,000 people will fly Wednesday alone.

The Pikes Peak shuttle lot and East Economy lot are both full as of 6:00 a.m. Wednesday. Find both flight information as well as information on parking here.

Things seem to be moving smoothly with no major flight delays as of Wednesday morning.

Passengers early Wednesday were forced to use the Concourse A security bridge because of a technical problem that slowed train operations.

DIA cited a technical issue with the trains early Wednesday morning. The airport said the trains were able to resume normal operations by 8:30 a.m. Wednesday.

Flyers should use for real-time updates on TSA wait times and parking availability.

If you do end up with extra time, don't worry, there's plenty to do.

Like yoga, for instance.

Yoga on the Fly's setup is located in Concourse A, and include private mini-studios equipped with yoga mats, wireless headsets and iPads for playing instructional videos.

Classes range from 8 to 20 minutes long, with sessions specific to yoga, meditation, and breathing.

The studio operates from 7 a.m. to 9 p.m. Sunday through Friday and 7 a.m. to 7 p.m. on Saturdays.

9NEWS reporter Eddie Randle spoke with a family of four flying to Nashville.

"Having two children we just like to be a little bit more prepared. We wanted to get here early and get ourselves set up so we're ready to go," said Nathaniel Schoen-Roda.

The best advice for the busy travel day: allow extra time to get to the airport early.