Answer: billboard

AnswerCrossword Clue
BILLBOARD

Highway ad site

BILLBOARD

"Hot 100" magazine

BILLBOARD

Magazine with the "Hot 100"

BILLBOARD
Annoyance or aid?
BILLBOARD
Interstate ad
BILLBOARDAdvertising medium.
BILLBOARDCosby two-by-four?
BILLBOARDBig pitch
BILLBOARDPitch off the road
BILLBOARDOgden Nash never saw one as lovely as a tree