are those cell phones half buried in the earth between every yellow line .-. ?

They are reflectors. They do look like phones though.

why is there reflectors in the road i thought the paint that makes the yellow lines was reflective .-.

It's common.
http://i271.photobucket.com/albums/jj125/Gizmojunk/plasticroadmarks.jpg

oh

they're reflectors with the plastic part worn away.

reflectors are primarily used to help a person see where they should be on the road while driving at night.