Dr. Sigit Pranowo Hadiwardoyo (sigit@eng.ui.ac.id; Department of Civil Engineering, Universitas Indonesia, UI New Campus, Depok 16424, Indonesia) is a professor at Universitas Indonesia, a lecturer in the undergraduate, graduate, and doctoral programs, and a researcher at the Structure and Materials Laboratory, with expertise in road pavement, transportation engineering, railway engineering, and transport economics. He has authored over 70 Scopus-indexed and 104 Google Scholar-indexed articles, earning 362 and 796 citations, respectively. His research focuses on sustainable materials, including innovations in Buton rock asphalt and recycled aggregates.