Licence may be the correct term - perhaps registered
Only if a private camera is looking at only your property and within the boundary of your property is it not required to be subject to DPA.
But I believe the OP stated that the camera would be used to look at the cars in his street...this is subject to DPA and thus requires to conform to the criteria. So if the OP is using a CCTV without meeting the necessary requirements is subject to criminal prosecution. Also if a member of the publice took this to court as the OP has illegally filmed him....the OP could be subject to heavy losses for compensation.
Not sure how you register the camera and who too - but I am sure the OP could get the information.
Chris