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SALEM -- The Oregon House has voted to allow police to use photo radar in high way work zones -- even when there are no workers on site.

State lawmakers voted in 2007 to allow photo radar in work zones but only when construction crews are present. It expires next year.

The measure approved Wednesday would make the law permanent.

The Oregon Department of Transportation says speeding fell 23 percent when photo radar was introduced.

The department says speeding drivers pose the biggest risk to themselves and construction workers when they're in work zones.

Democratic Rep. John Lively of Springfield says photo radar will encourage drivers to keep their speed down when passing through a work zone.

ODOT says there are an average of 500 work zone crashes per year in Oregon, and nine fatalities.

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