Generic rules for No-equilibrium phase transition.

 
trafic

    
I am not a trafic controler nor do I like trafic jams. This picture  represents
that  a "jamed state" can spontanuously occur  within a "freely moving state"
when certain parameter (velocity of cars or breaking of trafic rules)  change.
This is like a phase transition. Unlike equilibrium phase transition, here the
jamed configuration can still move with certain velocity.  These   are
are non-equilibrium phase transitions (there are amny other examples,  I will add 
later).
 
In equilibrium, we have certain guidelines on 'what kind of system can
exibit phase transition'.  Could we  say anything generic about non-equilibrium
phase transitions ?

(pa
ge under construction)
Ref :
  arXiv:cond-mat/0405049 [ps, pdf, other][Euro. Phys. J. B 41, 223 (2004)]
Title: Modelling one-dimensional driven diffusive systems by the Zero-Range Process