Abstract This study examines the bike access risk gap (BARG) for commuting in the 50 most populated metropolitan areas in the United States and equips bike advocates with the knowledge and tools necessary to identify the priority areas that need bike infrastructure improvements and the well-connected low-stress bike infrastructure. The analysis (i) examines the average BARGs of metropolitan areas for twelve travel time thresholds, (ii) considers the temporal and spatial disparities of slightly and extremely risky bike infrastructure, and (iii) reveals the disproportionate exposure of socially vulnerable populations to extremely risky bike infrastructure for a journey to work. The results indicate that (i) few metropolitan areas are associated with slightly risky bike infrastructure, (ii) the exposure to extremely risky bike infrastructure becomes more likely as commute travel time increases, and (iii) African Americans, Hispanics, low-income, and carless households are disproportionally exposed to extremely risky bike infrastructure and yet are the least prioritized in urban planning and bike infrastructure investments. The findings offer insights for identifying areas in which constructing low-stress bike infrastructure on or near high-stress bike infrastructure narrows the BARG.
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