Was ist heute Abend auf der Fahrbahn?

There's a lot going on on the highway this evening. There are:

• Steinwerfer auf einer Bruecke (people throwing stones off a bridge -- are there Americans in town?)
• Personen zum Fuss (not just people, but people walking)
• Eine grosse Plane (a large tarp)
  

I am sure that as Fasching heats up there will be more interesting things auf der Fahrbahn.