A sensor assembly is described herein. The sensor assembly includes a housing that includes an inner surface that defines a cavity within the housing, and a proximity sensor positioned within the cavity. The proximity sensor includes a first connector, a second connector, and a substantially planar sensing coil that extends between the first connector and the second connector. The sensing coil extends outwardly from the first connector such that the second connector is radially outwardly from the first connector.

Traffic control systems and methods to improve safety are disclosed. The systems, in some example aspects, include a first magnetic field generator mounted over an aisle for generating a first zone magnetic field defining a first zone. The methods, in some example aspects, include generating a first zone magnetic field defining a first zone by a first magnetic field generator mounted over an aisle. Other aspects include generating, and/or including a controller to generate, control signals to reduce the speed of a vehicle, and/or reduce the size of a danger zone.

A proximity switch, comprising a coil arrangement including at least two receiving coils and at least one transmitting coil, and a control and evaluation unit arranged downstream of the coil arrangement, the control and evaluation unit being configured to obtain a switching signal when a target approaches a predefined response distance of the proximity switch. The at least two receiving coils and the at least one transmitting coil are planar coils and are arranged in a common coil plane being arranged completely within one single copper layer. The common coil plane is oriented perpendicular to a longitudinal axis of the proximity switch. The at least two receiving coils and the at least one transmitting coil do not overlap one another in the direction of the longitudinal axis and do not enclose one another circumferentially.