A multi guide rail/way race circuit of huge proportion with off circuit stopping tracks, whereas the racers lie flat,supine on their backs within specially built luges,suited within pressurized G-suits.
The wrap-around guide rail system prevents derailment, and provides stability for the racers,and
the single guide rail allows the the EMP luge to make tight curves at high speeds.
Throughout the circuit optical sensors on the tracks tell when the luge is coming and to turn on the magnetic coils in the appropriate region to accelerate the luge as part of the propulsion system.Braking via EMP brakes.
NASA have demonstrated that a craft upon a sled that would be magnetically levitated and propelled at an acceleration of 2 gs reached a speed of 400 mph.0 - 400 in about nine and a half seconds.2 gs is still fairly comfortable.Maglev trains can reach well over 300 mph.
Originally, thought of a pair of maglev EMP boots, where,as you presume the position of a downhill skier,within a suit with locking straps to keep you that way.However if a 30-lb object on a track reaches speeds of 60 mph in less than half a second levitated above the track by about half an inch...I foresee problems.
" On your marks get set...gone...! "