  We study the derivation of second order macroscopic traffic models from
kinetic descriptions. In particular, we recover the celebrated Aw-Rascle model
as the hydrodynamic limit of an Enskog-type kinetic equation out of a precise
characterisation of the microscopic binary interactions among the vehicles.
Unlike other derivations available in the literature, our approach unveils the
multiscale physics behind the Aw-Rascle model. This further allows us to
generalise it to a new class of second order macroscopic models complying with
the Aw-Rascle consistency condition, namely the fact that no wave should travel
faster than the mean traffic flow.
