IMPT, or Índice Multimodal de Pobreza nos Transportes, is a composite, multimodal transport poverty index developed for the Lisbon Metropolitan Area (Área Metropolitana de Lisboa, AML) by the U-Shift Lab at Instituto Superior Técnico.

It is designed to quantify the degree to which residents in different locations across the AML are disadvantaged in terms of access, mobility, affordability, and safety across multiple transport modes (car, public transit, cycling, walking). It is intended to be reproducible and replicable for other metropolitan areas in Portugal.