The conversation between human and AI assistant.
What is the reason for concrete stones in between the railway track?
Are there any alternative materials for ballast other than concrete stones?
Yes, there are alternative materials that can be used for ballast, such as slag, gravel, and crushed rock. Some railroads also use synthetic materials like recycled plastic and rubber. However, each material has its own advantages and disadvantages, and the choice ultimately depends on factors such as cost, availability, and performance.