RT lives on as Alpine Bobsled at (Six Flags) Great Escape.
Parc Asterix France has recently opened La Trace du Hourra, their new 2953ft long Mack Bobsled. Check out the TV ad on their site;
www.parcasterix.com/som.htm Are there any recreational bobsleds in the US? They consist of inground steel chutes about 2ft in radius. The bobsleds/toboggans take one or two persons & you control it's speed via a friction brake. Have a look;
www.corin.com.au/ht_docs/bobsled.htm I've been on several tracks & it's great fun. Once did a run w/o using the brakes at all, hit 45mph, exceeded 90 degrees on some corners & experienced 2-3Gs. I think it needs "block brakes" as was trying to catch up with my friends & rear-ended him & "derailed." :) Otherwise I was very lucky not to get hurt badly as it could've been worse at those speeds.