  Dynamic properties of a one-dimensional probabilistic cellular automaton are
studied by monte-carlo simulation near a critical point which marks a
second-order phase transition from a active state to a effectively unique
absorbing state. Values obtained for the dynamic critical exponents indicate
that the transition belongs to the universality class of directed percolation.
Finally the model is compared with a previously studied one to show that a
difference in the nature of the absorbing states places them in different
universality classes.
