One of the perks of driving an electric vehicle in California is about to go away.

The state’s Clean Air Vehicle Decal program that allows drivers of zero-emissions vehicles to drive alone in the high occupancy vehicle (HOV) lane expires, effective at 12:01 a.m. Wednesday.

With rush-hour traffic jams and clogged freeways a fact of life in California, the stickers act as an incentive for people to buy electric vehicles, plug-in hybrids and hydrogen fuel cell cars. It’s estimated that 465,000 vehicles across the Golden State have active decals attached to them.

According to the U.S. Department of Energy , 13 other states have similar incentives in place.

But since the interstate highway system is funded by the federal government, the HOV initiative for zero-emissions vehicles requires

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