The report of EU Cooperative-‐intelligent Transport System Platform Working Group 4 has presented a number of issues and possible remedies. In order to validate the outcome of WG 4 a more in depth scrutiny of the results is being proposed for this Working Conference. Below the issues are presented that will be discussed in the Working conference. This list is by no means exhaustive. During the process of analysing and the interdisciplinary discussions any turn may be taken. Since most issues have both a technical and a juridical aspect, which will influence one another, it is hard to separate technical and juridical issues. Nevertheless, a distinction will be made in technical and juridical issues on the basis of the origin of the item.