Some legislators concerned about how to pay for new highways in Texas suggested looking at increasing the 20 cents a gallon state fuel tax.
Members of the Texas Senate Transportation Committee, who convened in El Paso, said money is lacking to build new roads.
Carona said the state fuel tax has been the same since 1991.
Texas charges 20 cents for each gallon of gasoline pumped. Motorists also pay about 18 cents a gallon in federal taxes.
Rep. Joe Pickett of El Paso says it's too early to offer precise figures on how much the state fuel tax might need to be raised.