The UK’s Transport Technology Forum, an independent voluntary body, has produced a guide about communication technologies for C-ITS which is intended to support policy developments.
The guide describes succinctly the features of the two main communication technology options (short-range/ITS G5 and long-range/cellular) and addresses the dilemma that the party paying for the delivery of a particular C-ITS service (in terms of hardware and/or data transmission) may not necessarily be the one benefitting.
The technical capability of each technology to deliver a set of day 1/1.5 services is presented. The guide concludes that the decision should not be about which technology to invest in but which C-ITS applications can deliver benefit to traffic management in the UK. There is an expectation that a hybrid approach will emerge.
The guide can be downloaded here.