https://www.cnet.com/roadshow/news/waymo-self-driving-car-facility-detroit-american-axle/

The autonomy arm of Alphabet first established a footprint in Michigan in late 2017, when the company announced it would start testing its fleet of Chrysler Pacifica self-driving development vehicles in the southeast corner of The Great Lakes State. Waymo followed that up with an announcement this past January that it would seek to establish a manufacturing facility in the same area.

The facility will be used to outfit Waymo's vehicles with the hardware and software necessary to enable the cars' autonomy. In addition to engineers putting everything together, the location will also house fleet coordinators and other jobs dedicated to bolstering its local operations. Waymo claims it will be the world's first factory dedicated to producing Level 4 autonomous vehicles. SAE Level 4 autonomous vehicles, by definition, are capable of driving themselves in specific geofenced locations under specific operating conditions.