The International Harmonized Research Activities Working Group (IHRA) on Intelligent Transport Systems (ITS) was established to coordinate, collaborate and exchange information on research aimed at optimizing the safety performance of ITS. This report describes some of the key activities in recent years. The working group has also started to publish a IHRA-ITS newsletter through INRETS that describes these research activities. The working group continues to pursue seven priority research topics. This group recently offered to support the UN-ECE World Forum for the Harmonization of Vehicles (WP 29) Informal Group on ITS in their efforts to establish a common understanding of new in-vehicle ITS technologies and to exchange information. In the next year, this working group will brief the WP.29 ITS informal group on a number of key safety issues for ITS. In sum, the IHRA-ITS working group continues to be an effective forum for international harmonized research on ITS safety.