This proposal aims to develop a new generation of sensor system for 3D vision in automotive and industrial applications, based on single photon avalanche diodes (SPADs). A key advantage of SPADs is that they enable the construction of accurate 3D images via time-of-flight, that is by emitting laser pulses towards a target, and timing the return of the reflected signal. Crucially, SPADs are able to detect targets from only the few photons (particles of light) that can be acquired in the millisecond timescales critical for the detection and tracking of fast moving objects. The proposed sensor will feature complex on-chip processing to extract salient features at frame rates an order-of-magnitude faster than current (2D) cameras in advanced driver-assistance systems, and thus provide crucial advantages in collision avoidance.