The Second Synthesis Report of Voluntary National Reviews (VNRs) (2017) was released by the Division for Sustainable Development (DSD) and the Department of Economic and Social Affairs (DESA) under the United Nations. The second report synthesizes the 43 VNRs submitted to the High Level Political Forum (HLPF) in July 2017 and provides a snapshot of general characteristics of the early implementation of the 2030 Agenda, and identifies challenges and examples of implementation from the reporting countries.

Compared to the first synthesis report where there was no reference included on sustainable transport development, the second sythensis report in 2017 has considerably expanded its references to sustainable transport by citing a number of examples on the challenges and actions taken in the transport sector to achieve the Sustainable Development Goals (SDGs), including SDG 3 (Good Health and Well-being), SDG 7 (Affordable and Clean Energy), SDG 9 (Industry, Innovation, and Infrastructure), SDG 11 (Sustainable Cities and Communities), and SDG 13 (Climate Action). The increase in transport references in the 2017 synthesis report is crucial to help consolidate the critical role of sustainable transport to achieve the SDGs.