Wait a min…there’s no permanent tracks. Roads are closed temporaly for hillclimb races and the EV races 
On the other hand, engineers are needed to build a permanent track 
The Federal Council is also bringing into force the revised Road Traffic Act, which lifts the ban on motor racing on circuits in Switzerland. However, the return of these sporting events will be regulated: the cantons, which will issue the permits, will ensure that the events comply with, among other things, safety standards and environmental protection requirements.
Tangentially, it also became legal to drive a truck during nights and Sunday provided perishable goods or farm animals are transported. Great news, transported animals will not be stuck in traffic if moved at midnight. I’m just wondering if trucks can deliver food to Migros and Coop at 3AM.