In the case of the Mercedes Steering Assist and Volvo Pilot Assist II, occasional driver intervention is required, otherwise the system deactivates. I had a chance to briefly test Volvo Pilot Assist II over the course of a day’s drive in a 2017 S90, but it was on unfamiliar roads at a press event in Spain. As the name suggests, Volvo Pilot Assist II is not completely new. Pilot Assist II doesn't need to sense a vehicle ahead and can operate at speeds up to 80 mph, as opposed to 30 mph for the first-gen version. On narrow Spanish roads I’d never driven before – and in heavy traffic – I was hesitant to trust Pilot Assist II and mostly kept my hands lightly on the wheel.

Source: Forbes February 27, 2017 21:00 UTC