Hamilton's historical roots as an electric, industrial and transportation-oriented city provide it with a high potential for rapid transit, especially when combined with its growing population, developing economy, redeveloping downtown core and its plans for sustainable growth. This paper explores the health, environmental, social and economic impacts of light rail transit, a component of the City of Hamilton's rapid transit initiative. It performs a comparative analysis with other major North American cities that have successfully implemented this form of mass transit. The analysis concentrates on three main areas: urban development and land values, health and environmental impact and socio-economic factors. The results of the research on light rail transit (LRT) and its possible benefits indicate overwhelming support for the economic, health, environmental and social benefits of LRT, especially when compared to other forms of transit, including rapid bus and local transit schemes. According to the results, LRT in a medium sized, growing city such as Hamilton should be considered a viable and desirable transit option; a catalyst for transit oriented, high density, mixed use development; an economically sound investment opportunity, providing a return on investment to property owners, businesses and the municipality; and a catalyst for social change, improving the health, environment and connectivity of the community.