Why did the cow cross the road?

Sometimes I think the joke here should be "Why did the cow cross the road?" Possibly the best answer would be "to stop traffic." Other possibilities include:

because it could

to get to the garbage pile

to add an obstacle to the road

because it thought someone had food for it

because there is less traffic in the middle

because it was time to wander home

all the other cows were going there

to test driver's reactions

It believed in free range grazing

I wonder how many others I could come up with?