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S90的Pilot Assist半自动驾驶可以在最高130km/h沿车道行驶并随道路干预转向，能随前车加速或减速而增减速度。当驾驶员进行了打转向灯等主观的变道或超车动作时将会自动提速帮助完成这个操作，但这时需要驾驶员主动操作
这个版本的半自动驾驶你可以把它看作一个更安全更高级的ACC，17年沃尔沃将在瑞典启动Drive Me自动驾驶测试，那时的Pilot Assist将能在特定已知的高速公路上进行变道，超车等操作
现款的Pilot Assist（如现款XC90上所配的）只能在50km/h下运行. 以下是现款Pilot Assist的介绍： ACC is supplemented with Pilot Assist.
This means the car cannot only keep the set speed and distance to a vehicle in front, but also supports the driver in keeping the car within the lane as well. It relieves the driver from the need to constantly adapt the speed to the vehicle in front and adjust the steering to keep within the lane in low speed traffic. Pilot Assist is available at speeds up to 30 mph.
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