I've been considering building a large "Situation Testing Route" for testing trains in situations like dynamic braking/air braking, helpers, uphill climbs, coasting, stopping for red signals, crew changes, switching, helper braking downhill, passing loops, switching over to other track, stopping at stations/industries, etc. and the route has all kinds of industries, curves, junctions, yards, railroad crossings, grades, bridges, tunnels, sidings, passing loops, horseshoe curves, flyovers, diamonds, etc.
What does anyone think?
What does anyone think?