Why are there stones on railway tracks?
Why do we see stones in between railway tracks?
What are the diamond shaped structures in the middle of railway tracks? Why do we use stones in houses? Why do railway traffic lights have green at the top and red at the bottom but road signals are the other way? What are the uses of stones in construction material? How do rail lines work? Why are the signals in railway opposite as compared to the road signals in India? i.e. from top to bottom Green, Yellow and Red. Why does railway traction wire consists of two wires? What is the reason for embedding slightly bigger stones in Kolkata's roads? Why do we use steel with concrete? Which material is used to build running tracks? Are they softer than the material used in laying footpaths? What stone is this? What's the difference between a rock and a stone? What is stone? Why Goods train allowed to pass rather than express train? What is the cause of moving stones of Death Valley? Why do tanks have tracks instead of wheels? What are those big metal grates you see on city sidewalks? What is this stone? Why do express trains have a red light at the lower side of the last compartment? Why do Loco Pilots wave green flags when two trains are crossing each other? What kind of stone is this? What are "paving stones"? How are a bullet train's wheels assembled? What is the use of the rails used in the middle of some tracks? Why are concrete bricks not burnt but watered? How do rocks and minerals differ? What is the scientific truth about Sailing Stones in Death Valley? How does a train track without ballast work? What is the relation between rock, mineral and ore? Is limestone a stone?