Abstract: Vehicle-detection apparatus, for installation at highway toll-booth, parking-area, and like sites, includes elongated thin-strip electrical switching sensors disposed near a road surface and oriented transversely to traffic directions, for responses to tire-transmitted loadings, the switching sensors each being in the form of a pair of narrow highly-elongated flat conductive strips, at least the upper one of which is springy and both of which are cartridged in a minutely-spaced substantially parallel relationship within a shallow open-topped flat-bottomed rigid channel member, the minute spacing being maintained by plastic insulating tape sandwiched between the strips only near their edges; the plural sensors are cast into a tough but somewhat flexible plastic mass in side-by-side relationship atop a stiff backing plate, with the upper strip being parted from the mass by a thin plastic sheathing, and the top surface of the cast assembly is rendered non-skidding by way of abrasive particle embedments.