How long are security lines for your flight? Salt Lake City International Airport now posts the wait time.

(Steve Griffin | Tribune file photo) Security line at the Salt Lake International Airport, October 5, 2017.

Salt Lake City International Airport is now publicly posting current wait times to pass through security lines.

They are posted online at slcairport.com, and on five large TV monitors at the entrance to checkpoints. It uses technology that tracks (and times) passengers anonymously as they enter and pass through the lines.

It “will not only help travelers plan their time before coming to the airport, but also alleviate anxiety by knowing they will make it to their gate on time,” said Bill Wyatt, executive director of the airport.

He said the data will also help the airport and the Transportation Security Administration to better manage the screening lines.

The airport serves more than 25 million passengers a year but was designed to handle fewer than half that number. It is building a new $3.6 billion concourse and terminals to replace current facilities. The first phase of the project is scheduled to open in September 2020.

The airport encourages passengers flying domestically to arrive two hours before their flight boarding time, and three hours early for international nonstop flights.