  Commercial Adaptive Cruise Control (ACC) systems are increasingly available
as standard options in modern vehicles. At the same time, still little
information is openly available on how these systems actually operate and how
different is their behavior, depending on the vehicle manufacturer or model.T o
reduce this gap, the present paper summarizes the main features of the openACC,
an open-access database of different car-following experiments involving a
total of 16 vehicles, 11 of which equipped with state-of-the-art commercial ACC
systems. As more test campaigns will be carried out by the authors, OpenACC
will evolve accordingly. The activity is performed within the framework of the
openData policy of the European Commission Joint Research Centre with the
objective to engage the whole scientific community towards a better
understanding of the properties of ACC vehicles in view of anticipating their
possible impacts on traffic flow and prevent possible problems connected to
their widespread. A first preliminary analysis on the properties of the 11 ACC
systems is conducted in order to showcase the different research topics that
can be studied within this open science initiative.
