The car allowed a shift in residential locations, as civil engineering grew to handle the infrastructure requirements, allowing the growth of the suburbs. As shown by Ford, the car changed the economic landscape. The efforts to resolve costs that have ensued from the influence of the car, such as pollution and fuel costs, will have a similar impact on the economic landscape. For instance, providing carpooling lanes to cars with multiple passengers has received attention as it helps reduce traffic. Sharing one or more cars between many people reduces the fixed costs per person and limits extraneous vehicles; the use of fleet vehicles affords savings through joint use of a set of autos by a very large group of persons either for business or pleasure.