California air regulators have reversed a mandate that required sun-reflecting glass to be installed on all vehicles sold in the state.
The California Air Resources Board made the change after critics complained the new windshields might block cell phone signals in remote areas.
Law enforcement officials also expressed concern that the windows would interfere with the electronic signals from ankle bracelets worn by paroled felons.
The idea behind the new rule was to reduce the amount of air conditioning and fuel used by vehicles.
The rules were adopted by the board last year and reversed on Thursday. They had been expected to go into effect in 2012.
