During the 20th century, urban transportation planning in North America was mainly concerned with easing traffic congestion, improving safety and saving time for motorists. These days, most cities鈥 transportation plans evoke a more complex blend of environmental, economic, and social-equity goals 鈥 all aimed at promoting 鈥渟ustainability.鈥 Yet, many fail to include meaningful measurements of social-equity objectives, such as helping disadvantaged neighborhoods access essential services, according to researchers at 缅北强奸.