Weather variation looks great, adds variety and increases immersion level to the simulation, but I'm trying to determine if weather in TSW is mainly eye-candy, or also affects train performance? It certainly VISUALLY impacts my driving performance, with fog, heavy snow/rain, obstructed windows, wipers sweeping, etc, all affecting being able to see platform stop positions & signals/signs ahead... and thus my SPEED! How about TRACTION, BRAKING capabilities & other engine performance factors? Do the "Sanding Application" controls actually work and help wheel adhesion when applied? In some areas, real railways even have official environmental caution signs for locomotive drivers (like a black leaf on a yellow sign showing poor adhesion in some wooded areas in the fall, or wind caution signs, etc). Just wondering what players have noticed... any insight, Dovetail games?