As a result of House Bill 605, 81st Legislature, Regular Session, the Comptroller's office will no longer publish the Texas Mileage Guide effective Jan. 1, 2010. State employees may calculate the number of miles traveled by using their vehicle odometer reading or a mapping Web site. Each state agency and institution of higher education will determine the online mapping site to be used by its employees.
http://www.window.state.tx.us/comptrol/texastra.html