NM_AMN_11gpLIGHT#10101 February 25, 2015 By Mike Schoemer A 3M-Opticom traffic signal device, shown as the white light, in the light bar of a new Grand Prairie Police Car. The device allows emergency vehicles to change traffic lights en route while responding to calls. 05262008xMETRO 06092008xMETRO Share on Tumblr
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