Google's self-driving cars have popped up in four cities over the past several months, including Phoenix, Arizona and Kirkland, Washington. Drivers there may have encountered Lexus RX450h SUVs riding around with funky Google cameras sitting on top. Now Google has partnered with Fiat Chrysler Automobiles for its next wave of self-driving vehicles.

Google has plans to more than double the size of its self-driving fleet, starting with the addition of around 100 new 2017 Chrysler Pacifica Hybrid minivans. FCA is designing the minivans so that Google can easily stick in computers and other components necessary to make these vehicles able to drive themselves. The vehicles aren't ready yet, but Google hopes to have some on the road by the end of this year.