Finding the most suitable transport project is one of the most important tasks of transport planning. This task gets more complicated as the sustainable criteria get involved. In this paper, a new method of multi-criteria group decision-making with unknown attribute and expert weights is proposed to address the sustainable transport investment selection problem. To make the method more powerful in dealing with uncertain elements, an Interval-Valued Pythagorean Fuzzy (IVPF) set is used as a useful tool to handle uncertainty. First, a generalized entropy measure under an IVPF environment is introduced, which enables the method to determine the fuzziness of the attribute values, which are expressed by Interval-Valued Pythagorean Fuzzy Numbers (IVPFNs). To determine the fuzziness of IVPFNs with identical membership and nonmembership degrees, a generalized knowledge measure of the IVPFNs is also introduced. Based on this measure and considering the deviation among attribute assessments, a new optimization model is presented to obtain unknown attribute weights. In addition, based on the extension of the VIKOR method, a novel algorithm is introduced to determine the unknown expert weights. Finally, to show the efficiency of the proposed methods a real case study is considered. Technology where he taught several graduate and under graduate courses, supervised 8 PhD and more than 65 master students. Prof. Hashemi's area of research includes Graph Theory and Applications, Algorithm and Complexity, Network and Combinatorial Optimization, Operation Research, and Transportation Systems, in which he has published more than 150 peer reviewed journal and conference papers presented nationally and internationally. Hashemi was involved in several industrial projects including design and managing the enterprise application safety systems, designing integrated public transportation network for Tehran, introducing the BRT system in collaboration with ITDP (Institute for Transportation and Development) and Iranian national ITS Architecture. Prof. Hashemi has held various academic positions including Dean of He has obtained the outstanding rank as the top 1% scientist and researcher in the world elite 32 group since 2014. He has published 4 books, 23 book chapters, and more than 1000 journal and conference papers.