Your mail may be carried in an automatic truck soon.
The US Postal Service testing out self-driving vehicles for the first time.
Starting Tuesday, autonomous semis will haul letters and packages more than one thousand miles during a two-week pilot program.
Operated by San Diego-based startup Tu-simple, the trucks will make five round trips total between USPS facilities in Phoenix and Dallas.
For now, a safety driver and an engineer will be on board to intervene if necessary, but the tech company hopes to operate completely driverless in the near future.
If successful, self-driving trucks could save the postal service hundreds of millions of dollars by eliminating human drivers.
While the program is only a test run, USPS says the technology could revolutionize the future of long-haul transportation.