In recognition of the global road safety challenge, the United Nations General Assembly in April 2016 adopted resolution 70/260, which requested the Secretary-General “to consider the possibility of establishing, from voluntary contributions, a Road Safety Trust Fund, to support the implementation of the Global Plan for the Decade of Action and the road safety-related Sustainable Development Goals.” Pursuant to this resolution, and as requested by the Secretary-General, UNECE has hosted the secretariat of the United Nations Road Safety Trust Fund since 2018. The United Nations General Assembly through Resolution 74/299 proclaimed 2021-2030 as the Second Decade of Action for Road Safety with the ambitious target of preventing 50% of road traffic deaths & injuries by 2030. This has given a renewed direction and importance to the work of the Fund. The 2020 Resolution also invited the Member States to further invest in road safety at all levels, including by supporting the United Nations Road Safety Trust Fund (UNRSTF). The objective of the UNRSTF is threefold: (i) strengthening road safety management capacity at the national and local levels, and unlocking sustainable sources of domestic road safety financing in low and middle-income countries by mobilizing global financial and technical resources; (ii) supporting road safety programmes at the national and local levels across the five pillars of the Global Plan for the Decade of Action for Road Safety through funding support to participating institutions and organizations throughout the investment cycle; and (iii) coordinating complementary channels of road safety and sustainable transport assistance to countries and cities to harmonize initiatives for the Sustainable Development Goals, to maximize the effectiveness and efficiency of the goals. This project builds upon Phase 1 and Phase II of the “Secretariat to the United Nations Road Safety Trust Fund” implemented between 1 October 2018 and 31 December 2020 and 1 January 2021 and 31 December 2021 respectively. At its fourth session on 8 July 2020, the UNRSTF Advisory Board extended the UNRSTF from its end date of 31 December 2021 until 31 December 2030, in line with the 2030 Agenda for Sustainable Development as well as the Decade of Action for Road Safety 2021-2030. An independent evaluation of the first phase of the project was finalized in April 2021 and its recommendations have fed into the design of this phase.