Correlation functions in the Nagel-Schreckenberg model

We investigate the effect of the jamming transition oa short-range correlat ion functions in the Nagel-Schreckenberg cellular automaton model of single -lane traffic. At high densities the structure of the time-dependent correl ation functions is double peaked. One peak corresponds to moving cars, the other to blocked cars. The emergence of the latter peak as well as the occu rrence of short-range anticorrelations behind the propagating peak is relat ed to the jamming transition. At even higher densities the peak correspondi ng to moving cars disappears which is an indication of a superjamming trans ition.