If your memory of slot cars as a childhood toy is of lightweight controllers with wire-wound rheostats inside, then you’re many years behind the state of the art when it comes to competitive ...

but the 2 km [eRoadArlanda] takes the concept of the slot car to the next level. The top of the rail is grounded while the live conductor is kept well underground beneath the two parallel slots.

There’s some preparation involved, but the video mostly showcases how fast these slot cars can go. If you jump to around the 3:20 mark, you’ll see the guys controlling the cars… and it looks ...