The Prime is a plug-in Prius that can usually drive about 23 miles on electricity only. It can cruise on electric-only power at speeds up to 84 mph, but the gas engine tends to start up in cold weather and at highway speeds, even in EV mode. When not running in EV mode, the Prime operates much like the regular Prius, alternating between electric and gas power. With slightly altered styling than the regular Prius, the Prime is can hold only four passengers, and it loses the rear wiper. Ride and handling are quite similar to the regular Prius, with responsive handling and a compliant ride. Standard safety features include automatic emergency braking and lane-keep assist.