Traveling road bikes that disassemble I did a ride with a guy who had a bike like this http://www.sandsmachine.com/a_rod_r2.htm 

It was a regular road bike (Allow) that you could disassemble and fit in a case slightly larger than the wheels. 

He said he used his bike for Triathlons and other riding events. 

I am interested in configuring my own bike to work this way (Regular road bike, steel)
The mechanism that allows disassembling the frame is called an S&amp;S Coupling, Bicycle Torque Coupling or BTC.  Searching for bikes with this mechanism should allow you find other models of bikes that can be disassembled in the same manner.