This educational film, made by the Texas Department of Highways (now named the Texas Department of Transportation) examines how mailboxes can be very dangerous for motorists. Custom mailboxes, mounting height, material and design of the support, and proximity to the roadway all determine how safe or hazardous a mailbox or mailbox cluster can potentially be. Using crash tests and extensive design research performed by engineers, the Texas Department of Highways improves its state mailbox regulations.