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For the next two weeks, package deliveries in the Southwest could get to your doorstep by way of robo-truck.

Starting Tuesday, self-driving truck company TuSimple is taking on a U.S. Postal Service (USPS) route between the national postal service's Phoenix and Dallas distribution centers – that's more than 1,000 miles the mail trailers cover throughout Arizona, New Mexico, and Texas.

Several autonomous trucks will run for 22 hours, including night driving, with a safety engineer and driver on board for five round-trip delivery hauls. These types of routes (long-haul with quick turnaround) usually require a two-member driving team since it goes overnight.

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TuSimple is a Chinese startup that started testing in Arizona a few years ago and is slated to have 50 autonomous trucks in its fleet by next month. Now it hopes to show with the USPS pilot that its robo-trucks can handle these labor-intensive routes. Then USPS (or other trucking partners) can keep shorter, closer-to-home routes for human drivers. Those routes tend to be more complicated and require more nuance.

U.S. Postal Service truck routes will be taken over by self-driving trucks in a two-week pilot.Credit: Dünzl/ullstein bild via Getty Images

USPS could cut down costs if it can deploy trucks for longer hours, especially on routes that are normally human intensive. Studies point to a possible truck driver shortage in coming years with an aging workforce, especially for long-haul trips.

SEE ALSO:Amazon patents delivery robot that docks at your house

Last week, TuSimple swatted away rumors that e-commerce giant Amazon was looking to acquire the self-driving delivery company. Chinese media had reported possible negotiations. An Amazon spokesperson emailed Mashable that the company doesn't comment on rumors or speculation.

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Meanwhile in Sweden, driverless truck deliveries from Einride started last week on public roads there -- with a very futuristic look.

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