Waymo -- Alphabet's autonomous vehicle company -- announced that it would resume testing its trucks on Phoenix freeways. The company had pulled its Class 8 trucks off the road back in 2017, after some brief tests in the state. Tests of the self-driving trucks will commence in Phoenix this week, a Waymo spokeswoman told Engadget over email. Each truck will be operated by two "trained" drivers, with the eventual goal being to move towards a completely driverless model.