Ardhi, Ardhika Budhi Laksono, and Brasie Pradana Sela Bunga Riska Ayu. “Innovative Efforts to Improve Traffic Safety through Singing Road Technology on the Waru–Juanda Toll Road”. Jurnal Perintis (Pengembangan Riset Inovatif Teknik, Teknologi, Dan Sains), vol. 1, no. 4(Juli-Agustus), Aug. 2025, pp. 137-43, https://ejournal.pktj.ac.id/index.php/perintis/article/view/54.