today in intriguing german loanwords:

geisterfahrer • a driver who mysteriously appears on the wrong side of the road.

urban dictionary clears up the mystery on why german speakers need a word for this seemingly rare phenomenon:

[Its literal translation is] “Ghost Driver;” a driver who drives on the wrong direction on an autobahn, often with headlights turned off at night. Usually a drunk driver but can also be a thrill seeker, suicide attempt, or horrendous driver error.

__

finally: i collected german loanword posts together into one tag. it is this one

update: luke (a real person) clears up the mystery, here.