| ECE/TRANS/WP.5/GE.4/17 - Annotated provisional agenda for the ninth session (30 September -1 October 2019) |
| ECE/TRANS/WP.5/GE.4/18 - Report of the ninth session (30 September -1 October 2019) |
| ECE/TRANS/WP.5/GE.4/2019/1 - Consolidated list of terminologies on benchmarking of road, rail, inland waterway and intermodal terminals construction costs - Note by the secretariat |
| Informal document WP.5/GE.4 (2019) No.1 - Consolidated list of terminologies on benchmarking of road, rail, inland waterway and intermodal terminals construction costs - Note by the secretariat |
| Ihku - Infrastructure Cost Management System Alliance Project (Mr. Ari Huomo, Finnish Transport Agency) |
| Collecting data on the construction costs of inland waterways (Ms. Victoria Ivanova, UNECE) |
