| GRB/2012/6 | Draft Recommendations for a Global Technical Regulation Regarding Audible Vehicle Alerting Systems for Quiet Road Transport Vehicles | |
| GRB-61-02 | Draft UN Regulation concerning the approval of Quiet Road Transport Vehicles | |
| GRB-61-10 | Presentation on the draft UN Regulation concerning the audibility of quiet road transport vehicles | |
| GRB-61-15 | WBU statement on the proposed quiet road transport vehicles regulations | |
| GRB-61-10 | Presentation on the draft UN Regulation concerning the audibility of quiet road transport vehicles |