Dash cams the must-have car accessory that will pay for itself. Enter the dash cam, a device that's exactly what the name implies: a camera that goes on your car's dashboard. These devices have achieved massive popularity in Russia, where video evidence of traffic accidents is preferable to spoken testimony in court. If a picture is worth a thousand words, a video is worth even more. It actually makes sense to have one in your car. Think about it: We see so many acts of unbelievable stupidity on the road. Doesn't it make sense to keep a visual record?