I can't seem to find an answer to this but apologies if this exists somewhere already.
From the last paragraph of section 2.0 in the lightning network paper version 0.5.9.2, "Micropayment channels create a relationship between two parties".
However the staked coins for the channel are held in a multisig address, and those addresses can have more than 2 signatures, max 20 signatures I believe, so can a lightning channel be set up that would be able to resemble more of a traffic circle than a 2 lane highway?