The project may also have indirect impacts if land development that follows the highway project also has impacts on land-use types, patterns, or distribution in outlying areas even though the highway does not pass through those areas. Changes in land use, at a given location and time can be due to a variety of factors including transportation interventions, socioeconomic changes, and implementation of new policy or control. As such, the process of isolating the effects of transportation systems on the land-use form can be complicated.