This case presents two questions involving the scope of the Texas Tort Claims Act's immunity waiver: (1) whether a governmental employee's control over a third party contractor constitutes "operation or use" under the Act's waiver of immunity for property damage "aris[ing] from" the operation or use of motor driven equipment, and (2) whether a subcontractor's workers who removed trees from private property adjacent to a public roadway were TxDOT "employees" under the statute.