Indonesia, as a developing country, faces challenges in improving people's welfare through development that is not yet optimal. Under the leadership of President Joko Widodo, the government is focusing on significant infrastructure development in an effort to encourage economic growth and modernization. Using Harrod Domar's modernization theory, this research examines how investment in infrastructure can encourage Indonesia's economic growth. The method used is literature study, with analysis of literature related to infrastructure development and modernization theory. The results show that toll road construction has a positive impact on transportation efficiency, community mobility, and economic growth, although it also faces several challenges such as environmental impacts and community involvement. The construction of toll roads, especially through collaboration between the government and the private sector, is an example of the application of Harrod Domar's theory in the context of Indonesian modernization, showing that effective investment in infrastructure can increase productivity and community welfare.

This research examines the dynamics of the use of sound systems as a cultural phenomenon and social competition in Sumbersewu Village, Banyuwangi. Using an ethnographic approach and Jean Baudrillard's concept of consumption society, this research explores the history of the emergence of sound systems and their evolution into an integral part of local community life. Focusing on the tradition of sound system fighting as the object of research. This research shows how the sound system has become a means of uniting young people in the village, while strengthening their cultural identity. Through direct data collection in the field, including observations and interviews with participants and local residents, this research describes how the sound system community in Sumbersewu Village organizes and prepares for sound system competition events, as well as how this influences social relations and the dynamics of local community life. The research results show that the use of sound systems not only reflects technological and cultural developments at the local level, but also plays a role in forming communities and strengthening social ties within them.