Related Clues:
- Phila. transit
- Ballad center?
- Urban trains
- Choices for Chicago commuters
- They have cars that people drive under
- Underground transport systems
- Ernie of the 24-Down
- 1994 U.S. Open champ
- South African who twice won the U.S. Open
- Lateral extremes?
- Tennis champ Ernie
- CTA trains
- Underground complexes
- Golfer dubbed 'the Big Easy'
- Chicago carriers