“O”字头汽车牌照,大多数人都熟知,这属于公安机关车辆专段牌照,延用至今已有好几年的历史。前段时间,河南省郑州市公安机关在全国率先宣布取消“O”字头标志,取而代之采用普通民用号牌。最近上海市也宣布将从明年1月1日起停用“O”字头牌照,规定公安机关除警车外的其它车辆一 “O” prefix car license, most people are familiar with, this belongs to the public security vehicle license plate, extension has been a few years of history. Sometime ago, the public security organs of Zhengzhou City, Henan Province, took the lead nationwide to announce the cancellation of the “O” prefix sign and replace it with an ordinary civilian number plate. Recently, Shanghai also announced that it will stop using “O” prefix plates starting from January 1 next year and stipulate that public security organs should not only one