NYC Subway Chaining Deep Dive – IRT Line Chains & Chain Zero Explained (Live)

⚠️ This is a long video—feel free to jump ahead to the sections that interest you most! 😊 After packing the basics of chaining into an 8-minute video, we heard your feedback! In this in-depth follow-up, we revisit the fundamentals of chaining, providing a detailed breakdown of the IRT’s line chains and chain zero. 📌 Note: B1 Chains aren’t covered due to length, but we’ll have a future video focused on track listings soon! 🔗 Watch the original video for an introduction to chaining: Original Video Chain Example (New York City Transit) 📏 100-Foot Chain Standard • 100+50 (10,500 feet) represents the distance from chain zero (starting point of measurement). • Signal plates reference chain locations to ensure safe and efficient operations. 📍 A Division Signal Plate: 1002 F • Top Line: • First 3 digits = Chain location (e.g., 100). • Next digit = Track reference (e.g., 2). • Bottom Line: Chain letter (e.g., F). 📍 B Division Signal Plate: F1 100 • Top Left: Chain letter. • Top Right: Track number. • Bottom: Chain location. 🎥 Watch our 101 video for signal plate visuals: 🔗 Chaining 101 📌 Video Chapters: ⏳ 00:00 – Introduction 📏 02:47 – What is a Chain? (Track alignment & location referencing) 📄 05:00 – Chains in Documentation & Construction (Real-world examples) 🔧 07:15 – Recreating a Chain (Virtual Route 5 setup) 🚇 11:52 – IRT Network Overview (Chaining in the IRT system) 🔚 28:18 – Closing & Future Topics ☕ Support us & help create more detailed content: Buy Us a Coffee 🔔 Subscribe for more deep dives into NYC’s transit system! #NYCSubway #TrainSignals #Transit101