The cards were issued for emergency purposes only - for instance, when workers run low on in a state-issued vehicle.
But officials say the cards were frequently used at retail fueling stations, such as Shell or ExxonMobil, which are easier to find but more expensive than state-owned gas stations.
Now, state employees driving for work will be required to fill up at New Jersey's 72 state-owned filling stations.
Officials say it will save New Jersey 77 cents per gallon pumped.
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