T This research evaluates the impact of the serang-rangkasbitung toll road development on lebak regencyy\\\'s economic growth, considering the vital role of toll road infrastructure in accelerating distribution and enhancing connectivity. the study aims to identify the toll road\\\'s impact on changes in basic, prospective, and progressive sectors, analyze related public policies using swot, and formulate strategies to optimize positive impacts. this study employs a quantitative approach using secondary data from the gross regional domestic product (grdp) of banten province (2018-2023) and primary data from questionnaires distributed to 400 business actors in lebak regencyy, as well as interviews with four key informants. regional economic analysis methods include location quotient (lq), dynamic location quotient (dlq), shift share analysis (ssa), klassen typology, and swot analysis. the findings indicate that the serang-rangkasbitung toll road strengthens basic sectors such as agriculture, mining, transportation, and accommodation. the manufacturing and construction sectors are identified as progressive and prospective, with construction consistently placed in quadrant i of klassen typology. nevertheless, the swot analysis reveals internal weaknesses, such as inadequate supporting infrastructure and regional development disparities, and threats, such as rapid land price increases and unequal business competition. the implications suggest the need for economic diversification policies, strengthening potential sectors, and empowering lagging sectors through inclusive and sustainable strategies.