Self-Service for Airport Security? It’s Happening in Las Vegas.

As most air travelers can attest, the experience at an airport’s security checkpoint can be far from serene. There are many rules — often shouted by Transportation Security Administration officers — about what you can bring with you, how to array your belongings and where to stand. Lines can be painfully long and anxieties sky high. And throughout the process, there are security officers.

But at Harry Reid International Airport in Las Vegas, a new kind of security screening, unveiled by the T.S.A. on Wednesday, is led by the passenger themselves.

The system, which uses video monitors, facial recognition software and body scanners, is not about shaving time off the travel journey, but about improving the overall passenger experience, said Christina Peach, a deputy assistant administrator for requirements and capabilities at the T.S.A.

“Individuals want to be able to complete the screening process at their own pace and with minimal interaction with our officers,” she said.

The new pilot program officially opens to the public on March 11. Here’s what to know.

Where is it and who can use it?

The self-service screening process, which is only available for travelers with T.S.A. PreCheck clearance, will be available at two security lanes within the “Innovation Checkpoint” at Harry Reid International Airport in Las Vegas. (The airport tests emerging technologies and new processes at six “Innovation Checkpoint” lanes.)

Traditional security screening will continue to be available for passengers.