While very specialised cars are required for top-level special stage rallying, unmodified, everyday cars can be used for simple road events, making this one of the cheapest forms for motor sport available. The essence of this type of event is to maintain a time schedule through a series of control points by following route instructions which often put a great emphasis on navigation. These events take place on normal public roads, almost always at night. All competing cars must be properly taxed, tested and insured.
An insite to Road Rally Navigation by Simon Bradley