TCR Driving Sets advert from the 80’s
Total Control Racing (TCR) was a toy brand from Ideal which debuted in the late 1970s, similar to slot car sets, with approximately HO scale cars (and smaller scale semi-trailer trucks) that operated on a slotless track.
The plastic track contained lanes of three metal tracks about 2 mm (0.08 inch) wide, which made contact with three brass pads on the underside of the cars, providing power. The plastic track had two such lanes, and cars could change lanes with the press of a button on the controller. TCR sets came with “jam cars”, a slow moving drone which both racers had to avoid crashing into. Like Matchbox’s Powertrack, some cars featured lights.
Info gleaned from Wikipedia