Possible Clues:

• Low-traffic street
• Late at last, and you can't get beyond that
• Still aim for the sort of job which offers no prospects
• Study to break complete impasse
• A blind alley, point of no further progress
• Late finish? There's no way out of it!
• Blind alley, closed passage
• There's no way to get beyond the last at last
• Blind alley, cul-de-sac
• A blind alley, sounds moribund