Legality
A number of municipalities have introduced strict laws in order to mandate against mobile advertisements; this has partially been due to the fact that wrap advertisements are purposefully circulated throughout high-density areas. New York City, in the United States (US), is a notable example, where any sort of motorized advertisement is outlawed. Mobile billboards have been identified as a contributing factor in the city's already-problematic traffic congestion issue. In areas such as New York City, non-motorized, mobile advertisements (e.g. "adbikes") are often employed.
Read more about this topic: Wrap Advertising