[95avblm3]

Not to beat a dead horse but the real problem with using flashers in the rain is that you can't distinguish who is actually stopped on the side of the road and who is still moving. Stupid.

One practice that is commonplace here in Germany and makes a lot of sense, particularly on the German autobahns is the use of 4-ways when traffic comes to a stop. It's a (slightly) early warning sign of an impending stau and makes it obvious who is paying attention. In the US, I suppose you would have to put your phone down to observe and react but not sure that is going to happen.