  Cities are home to a vast array of amenities, from local barbers to science
museums and shopping malls. But these are inequality distributed across urban
space. Using Google Places data combined with trip-based mobility data for
Bogot\'a, Colombia, we shed light on the impact of neighbourhood amenities on
urban mobility patterns. Deriving a new accessibility metric that explicitly
takes into account spatial range, we find that a higher density of local
amenities is associated a higher likelihood of walking as well as shorter bus
and car trips. Digging deeper, we use a sample stratification framework to show
that socioeconomic status (SES) modulates these effects. Amenities within about
a 1km radius are strongly associated with a higher propensity to walk and lower
driving time only for only the wealthiest group. In contrast, a higher density
of amenities is associated with shorter bus trips for low and middle SES
residents. As cities globally aim to boost public transport and green travel,
these findings enable us to better understand how commercial structure shapes
urban mobility in highly income-segregated settings.
