Migration from public transport translates to increased mileage even if the trips are shared. Nonetheless, the correlation the report observes with the rise of ride services and a decline in public transport ridership may not necessarily be a causal one as there are other potential explanatory factors. These other confounding factors include the drop in gas prices since 2013, which has a well-documented statistical relationship with transit ridership and an increase in the prevalence of public transport delays in the city over this period.