LaRA (La Route Automatisé), the Joint Research Unit between IMARA Lab at INRIA and CAOR Lab at Mines Paris, improves the state of the art of traffic prediction technology through statistical modeling based on instrumented probe vehicles. Working together with European industrial and research partners like TNO, Motorola and Intempora, the European project REACT demonstrated a breakthrough technology based on integrated in-car sensing and a traffic management center. SENDA, an INRIA's spin-off company licensing LaRA's traffic modeling technology, learned lessons out of REACT to overcome technical issues for cooperative system's deployment.