Cities in the US don’t have plans in place for where and how autonomous cars will be allowed to operate, nor are they considering how changing transportation trends will affect land use in city planning, according to a report from the National League of Cities. Although a number of major carmakers predict they’ll have driverless vehicles ready for sale by 2020 and ride-sharing companies such as Uber and Lyft are already operating across the country, the study showed that only 6% of city plans consider the effect of autonomous cars and only 3% consider the effect of ride-sharing.