A rider is on a 2x2 motorway with dense, uninterrupted traffic. One lane is covered with ice. What is the inter-files decision?

1. Do not ride inter-files because snow or ice on a lane prohibits it
2. Ride inter-files at 50 km/h because the road has 2x2 lanes
3. Ride inter-files only without gloves
4. Ride on the shoulder instead