Abstract: A motor vehicle guidance and control system for use with a roadway having marking elements, for example magnetic marking elements, which define the lanes of travel and also zones of lowered speed on the roadway. A plurality of sensors mounted on the motor vehicle detect proximity to the marking elements and a connected control means produces control signals corresponding to the position of the motor vehicle with respect to the lane of travel and also of the presence of a lowered speed zone. Indicating means provide visual and/or audible indication to the operator of the motor vehicle of any steering corrections that may be required to maintain the motor vehicle within the lane of travel, and of the presence of a lowered speed zone. Circuitry is provided for developing speed command signals for operating a steering servo and speed control commands to a speed servo.

Abstract: A magnetic control strip recording device for vehicle control systems. A paving machine (12) lays a strip (10) containing magnetizable material. A wheel (30) rotates in response to the movement of machine (12). Magnets (34), (36) on the wheel and reed switches (38), (40) adjacent the wheel are activated in response to the movement of the wheel. An electromagnet (21) is energized when the reed switches (38), (40) are closed creating a magnetic pattern in the strip (10) of magnetized zones having alternating polarities for adjacent zones. An alternative magnetic pattern may also be produced by opening the optional disabling switch (44). The switches (38, 40) are preferably capacitively coupled to the electromagnet (21) to prevent undue drain on the power supply should the wheel (30) be stopped with one of the switches (38, 40) closed.