I'm reading one of my Christmas presents, Michael Moorcock's The Metatemporal Detective, which is a lovely mishmash of victorian crime, westerns, the supernatural, sherlockian ambiance, and steampunk. I haven't run across any full fledged interior descriptions (although he does a great job of dropping hints so as to let your imagination fill in the rest), but I thought I would share this particularly steampunk tidbit:
As they climbed the steps of the heavy war-tram and took their places on the mahogany bench seats, the young buckaroo put a manly arm about his wife's shoulders. Soon the vehicle was in motion, racing back across the plains as a second machine collected track behind it, a demonstration of the skill and ingenuity of "Thunderclap" Meadley's famous "Flying Tracklayers," who had done so much for Texas' military reputation.
Yes, it's a bit pulp, and you know my biases towards Texas, but I think you'd find it fun nonetheless.