Parts 4 (VMS) and 5 (Measured and elaborated data) of the DATEX II standard EN 16157 are now entering CEN “enquiry” – the last stage at which technical comments can be made, through national standards bodies. Comment resolution will allow a DATEX II release (referred to as 3.1) in Spring 2020 to include the version 3 forms of VMS and RoadTrafficData namespaces. Due to the modular approach of DATEX II version 3, users shouldn’t think in terms of supporting v3.0 or v3.1 or any specific v3.X, but rather supporting v3 with a selection of modules (technically “namespaces”). Each release 3.X will increase the number of modules available.