Every city contains two transportation systems. One is the visible network of roads, rail lines, sidewalks, and bus routes mapped in planning documents. The other is the invisible geography of privilege and exclusion embedded within it: the neighborhoods that received highways instead of parks, the communities whose bus routes were cut, the sidewalks that abruptly end at the edge of a district. For many years, built-environment professionals have treated infrastructure as a technical challenge. Mobility justice insists it is, fundamentally, a political one.
