1
general::
Phrase(s): dead ahead
straight ahead; directly ahead. • Look out! There is a cow in the road dead ahead. • The farmer said that the town we were looking for was dead ahead.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Directly or straight in front of one, as in There's the house, dead ahead. The use of dead in the sense of "straight" dates from the last quarter of the 1800s.
American Heritage Idioms