“…These proposals of microscopic traffic models stimulated an enormous amount of research activity, aimed at understanding and controlling traffic instabilities, which are responsible for stop-and-go traffic and congestion, both on freeways (Sasvári & Kertész, 1997) and in cities (Helbing, 2001). Since then, cellular automata became popular for the microscopic simulation of traffic flow (Vilar & de Souza, 1994;Chowdhury et al, 2000;Helbing, 2001;Nagatani, 2002;Nagel et al, 2003;Maerivoet & De Moor, 2005), including multilane highways (Wagner et al, 1997;Nagel et al, 1998;Chowdhury et al, 2000;Nagel et al, 2003;Maerivoet & De Moor, 2005) and complex urban traffic networks (Fukui & Ishibashi, 1996b;Esser & Schreckenberg, 1997;Rickert & Nagel, 1997;Nagel & Barrett, 1997;Maerivoet & De Moor, 2005). Nowadays, there exist an overwhelming number of proposals and publications in this field.…”