A sensor system for a host vehicle may detect whether another in-path vehicle is turning. The sensor system may include a transmitter, a receiver and a controller. Signals may be emitted by the transmitter over a detection area. The emitted signals may reflect off an object vehicle in the detection area and be received by the receiver. The receiver may include a number of channels, each corresponding to a different region of the detection area. The sensor system may determine whether the in-path vehicle is turning and in what direction based on the reflected signals received at each channel.