Re: Crossing into other lanes--DRL usefulness?

->  My question is:  Unless you are turning, why do you need to see
oncoming traffic?  

How about when you are trying to pass on a 2-lane highway?  On US 95 
near Searchlight, Nev. they were quite useful for determining whether 
that car 1/2 mile ahead was coming towards you or just passing cars 
farther ahead. This road was quite busy, and even in the bright desert 
daylight it was easier to tell if the car was coming towards us when 
they had their headlights on.