Sustainable mobility indicators for Indian cities: Selection methodology and application

Various indicators of sustainable mobility have been developed. It is difficult to select the most relevant indicators that are useful in a specific context, and that are measurable and achievable at the same time. Indicator selection frameworks - criteria based; causal chains and causal networks have been proposed and used in the past. All three frameworks have certain limitations and strengths. In this study we have proposed a systematic approach of selecting sustainable mobility indicators for Indian cities by combining - criteria based, causal chain and causal network frameworks. The methodology involves both subjective judgments for evaluation of indicators against a set of criteria and objectivity during development and assessment of causal network. The method results in identifying 20 relevant factors for which 32 indicators are shortlisted. Further work is required to develop measurable indicators related to accessibility to the disadvantaged, speed limit restriction and street lighting. These have not been discussed in detail in the existing literature. The 20 factors are classified as root nodes, central and end-of-the-chain nodes that helps in identifying levers of attaining sustainable mobility in Indian cities. The developed causal network is evaluated for its ability to address all sectors associated with sustainable mobility. The causal network has low density and centralization index and therefore accounts for multiple factors. The shortlisted indicators are proposed for preparing low carbon mobility plan (LCMP) for three medium size Indian cities. The indicators are checked for data availability and ease of measurability based on the data collected for preparing the three LCMP5. The analysis shows that the data are available from secondary sources like census to measure root node indicators, whereas central indicators require conducting primary surveys and specific models are required to measure end-of-the-chain indicators. Based on the position of indicators within causal network, it is interpreted that pricing policy, urban form and infrastructure are the levers of sustainable mobility. The indicators of energy consumption, emissions and accessibility are the sustainable mobility targets that we want to achieve.