Related Clues:

• NYC subway manager
• Original N.Y.C. subway line
• '59 Kingston Trio hit
• N.Y.C. transportation debut of 1904
• LIRR operator
• N.Y.C. bus insignia
• Org. that keeps New Yorkers on track
• Subway line to Columbia U.
• NYC underground system
• Commuter-train org. in many cities
• N.Y.C. travel letters
• New York subway inits.
• Operator of the original N.Y.C. subway
• Where Charlie was trapped, in a Kingston Trio hit
• Urban transit letters