Soda locomotives saw very limited use, and though I’ve found some awesome photos and descriptions thanks to the research of enthusiasts online, I haven’t really found anything describing what exactly the process of draining the probably-boiling-hot caustic slop from the locomotive and refilling it with water and fresh...
Just for fun, a thought experiment, how much theoretically does it cost to build a commuter rail service? I’ve lived in a city that has thousands of cars commute to a close by city every day, about 30 miles away. It kills me that there is not an obvious commuter line between them....