The California Department of Transportation is recruiting motorists to test ways of reporting how far they drive to study the feasibility of replacing the state gas tax with mileage fees.
The 5,000 volunteers are needed for the California Road Charge Pilot Program created by the Legislature in 2014.
California Transportation Commission executive director Will Kempton tells the Los Angeles Times the gas tax is outdated and no longer capable of meeting all of the state's transportation revenue needs.
Kempton says the pilot program should give the Legislature the data it needs to determine how mileage fees might work.
Caltrans says the 36-cents-a-gallon state gas tax generates only enough revenue to fund $2.3 billion out of $8 billion worth of highway repair and maintenance that is needed every year.