| GRBP-78-11 | QRTV: Status report of the informal group | |
| GRBP-78-11 | QRTV: Status report of the informal group | |
| GRBP-78-11 | QRTV: Status report of the informal group | |
| GRBP-78-11 | QRTV: Status report of the informal group | |
| GRBP-78-11 | QRTV: Status report of the informal group | |
| GRBP-78-11 | QRTV: Status report of the informal group | |
| GRBP-78-11 | QRTV: Status report of the informal group | |
| GRBP-78-11 | QRTV: Status report of the informal group | |
| GRBP-78-12 | UN R138: Consolidated text | |
| GRBP-78-12 | UN R138: Consolidated text | |
| GRBP-78-12 | UN R138: Consolidated text | |
| GRBP-78-21 | UN R138: Comments on Specific Aspects of the Acoustic Vehicle Alerting Sound |
GRBP will be informed about the activities of the Task Force on Quiet Road Transport Vehicles (TF QRTV) and may expect a progress report of the Informal Working Group on Quiet Road Transport Vehicles for the Global Technical Regulation (IWG QRTV GTR).