Abstract: A vehicle steering system, with multiple independent systems, employing different route referencing, such as a primary system (10), referring to a physical reference line (30), or multiple discrete markers; and a secondary system (20), referring to an independent reference store (18), expressed as a sequential instruction table, configured as an emergency backup, implemented upon failure of the primary system; the system allows coordinated vehicle steering and braking, for adherence to a prescribe route; multiple discrete route markers (66) allow route banding (62), and multiple routes (60A, 60B).