Perhaps this word describing someone who drives into oncoming traffic should be considered for usage in English. Or would anyone like to offer a neological option?
Literally, it means 'ghost driver' strangely enough. A more obvious word for this type of driver is the synonym 'Falschfahrer' (wrong driver). The LEO online dictionary (leo.dict.org) offers this:
der Geisterfahrer - motorist driving against the traffic on motorways

Totally unacceptable, I'm sure you'll agree. With 'Zeitgeist' already adopted perhaps Geisterfahrer can/should be as well.