Driven vortices in three-dimensional layered superconductors: Dynamical ordering along the c axis

We study a three-dimensional model of driven vortices in weakly coupled lay ered superconductors with strong pinning. Above the critical force F-c, we find a plastic Row regime in which pancakes in different layers are uncoupl ed, corresponding to a pancake sas. At a higher F, there is a "smectic flow " regime with short-range interlayer order, corresponding to an entangled l ine liquid. Later, the transverse displacements freeze and vortices become correlated along the c axis, resulting in a tranverse solid. Finally, at a force F-s the longitudinal displacements freeze and we End a coherent solid of rigid lines.