Related Clues:

• Subway cousins
• Dull finish
• Corner pipes
• Higher form of transportation?
• Some housing add-ons
• Pipe connections
• Some rail transit
• Some urban lines
• High-level transit
• Some railway systems
• Right-angle shapes
• 2002 champion at 62-Across
• Right-angle bends
• Trains over the road
• Letters after kays