Introduction

This chapter establishes the historical, conceptual, and environmental context for light rail transit (LRT). It traces the evolution of rail-based urban transport from early horse-drawn streetcars and industrial rails to electrified tramways, highlighting how technological innovations such as overhead electric systems enabled mass urban mobility. The chapter explains how tramways shaped city growth, enabling suburban expansion while supporting economic activity. The decline of tram systems is linked to rising car ownership, bus substitution, and policy decisions favouring roads. However, the limitations of car-based transport—congestion, land requirements, pollution, and social fragmentation—are emphasised, alongside evidence that rail systems can attract significant modal shift from cars. Light rail is defined as an adaptable, electrically powered rail system operating in mixed, segregated, or dedicated corridors, combining accessibility with speed and reliability. The chapter contrasts LRT with alternatives such as buses and guided “trackless trams,” noting their weaker performance in attracting car users. Finally, it frames LRT as a response to urbanisation, environmental challenges, and economic constraints, arguing for systems that are financially sustainable, energy efficient, and capable of improving urban quality of life.