OLYMPIA, Wash. -- State transportation officials now know there are several ways to track how much drivers are using the state roads.

Consultants presented a number of options to members of the State Transportation Commission in Olympia Wednesday morning.

If the state decides to implement a pay as you go taxing system for drivers, motorists could be given several options.

GPS devices could provide the state with exact mileage amounts, but those with privacy concerns could choose to pre-pay the state for a limited amount of miles.

The state is looking at alternatives to the gas tax because more fuel efficient cars mean the state has less money to pay for road maintenance.

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