Miami International Airport will be installing 44 more self-service passport control kiosks to help speed up the customs and immigration process.

About half of all passengers coming through Miami's airport are travelling internationally. It first installed automated passport control kiosks in 2013.

The kiosks use biometric technology to match passengers' passports with face and fingerprint data. Officials say the machines have reduced the wait for U.S. citizens by as much as 40 percent.

The company SITA is providing the kiosks. SITA executive Paul Houghton says the machines process passengers in less than two minutes and help airlines and federal authorities maintain high security during peak travel periods.

Similar kiosks are in use at airports in New York, Los Angeles, Orlando, Philadelphia, San Francisco and Tampa.