Transport systems that begin each of the three theme answers

Question:

Answer:

SUBWAYS

Length:

Similar Crossword Questions:

Number of times this puzzle's theme word appears diagonally in the grid (to complete the puzzle, shade those words plus the Down answers that begin where they meet)
What this puzzle's theme answers contain (if you look closely enough)
Feature of this puzzle's theme answers?
"Dog the Bounty Hunter" network, and a hint to the theme in this puzzle's four longest answers
It's soft, strong, and demonstrated by this puzzle's four theme answers
Underground transport systems
Records "broken" in this puzzle's nine theme answers
Where one might see the sounds embedded in this puzzle's theme answers
Common easy crossword theme answers
What the theme answers can do
What the self-contradictory words found in this puzzle's theme answers are examples of
New element whose name will be ratified in January, 2010, and whose symbol appears in the middle of this puzzle's theme answers
Comic that comes to an end on October 3rd, and whose catchphrase ends this puzzle's theme answers
Compound found in perfume and this puzzle's theme answers
Item with features that begin this puzzle's four longest answers
Big letters, for short (and what your answers must be written in to understand the theme)
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Wise guys featured in this puzzle's theme answers
Word appearing in all nine theme answers
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1997 Kevin Kline film, and a hint to the puzzle theme hidden in four answers
Country common to the theme answers
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Big, and word that is found in all three theme answers
Second letters of this puzzle's five theme answers (seen in order)