The Texas Department of Transportation is responsible for many potential targets of both man-made and natural disasters. TxDOT has some of the most critical infrastructure of any state agency, spanning all 254 counties in the state. Employees at TxDOT must be prepared and remain vigilant for any contingency. Threats to TxDOT infrastructure range from ice storms, hazmat spills and terrorist attacks on bridges and ferries. TxDOT personnel should always be on the lookout for suspicious activities and should never confront or attempt to intervene when suspicious activity is suspected.