Urban configuration and urban transport system have an enormous impact on the travelling pattern of people. Travel can be characterized by trip frequency, travel distance, modal choice etc. With, the rapidly growing economies and population, there is an increasing trend of urban sprawl and auto-mobilization. This has a direct effect on the level of transport demand, travel patterns and its impact on the environment. Present study focuses on trip profile of the commuters by available modes to estimate the carbon footprints for different mode-combinational trips (trip profile including access, egress and main line haul mode) in public transport systems existing in Delhi, the capital city of India. The aim of the study is to include access and egress parts of the public transport trips (i.e. bus and metro) in carbon footprint estimation along with the main line haul trip which is lacking from traditional methods of carbon footprint estimations. This methodology consists of estimating the direct CO 2 emissions for different mode combination trips including the access ad egress trips with the main haul trip which is by bus or metro and comparing them under different scenarios. Carbon footprints of urban commuting provide insights into the potential impact of different policies. Questions such as where to apply certain policies (both in terms of mode and geographic area) to gain the largest reductions can be answered using such footprints.