| 摘要 |
Street-level advertising billboards may offer advertisers an additional method to reach consumers, either while they are driving or walking through city streets. The billboards may be located on stoplights, walk/don't walk signs, or the like. The billboards may include an electronic display panel for displaying an advertisement, a network interface for wirelessly sending collected data to and receiving advertisement display data from the advertisement system, and a sensor for collecting external data. The billboards may include one or more additional sensors for sensing security threats.
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