The road is so narrow that no two cars can fit next to each other, even for bikes and cars it is narrow in some places. But just above the valley village of Grindelwald, it is closed to public traffic (follow the MTB sign there). Only mountain farmers with a special permit are allowed up to the alp and cattle. And racing cyclists. They should have a large sprocket fitted, because it gets steep, with hardly a section climbing at less than twelve per cent.
You can find the entire passport profile as a PDF download below.
Downloads:
Pass profile: Switzerland: Männlichen