TxDOT will use available data as applicable to conduct the study. This includes but not limited to:

Data is also obtained from literature searches and purchase of materials such as GIS databases and land use plans from other entities such as government agencies (federal, state, regional, local), and private organizations. Counting traffic may be needed to augment traffic data that TxDOT has. Driving along the existing highway corridor and adjacent public roads in the study area can provide additional context and possible identification of land uses and environmental features that were not identified during the literature search. Data collection on private property such as taking photographs or subsurface samples is not conducted during a route study. The need to access private property for a route study is extremely rare and would only be requested by TxDOT and authorized by the landowner(s) only with written authorization.