Pretty good idea, as long as the law enforcement folks have decent/quick access to the data..

"This service will allow you to provide contact information to law enforcement in the event of an emergency. This information may save crucial time if ever it becomes necessary to contact family members, or other loved ones. This service is only available to individuals holding a current Florida Driver License or Florida Identification Card."<ul><li><a href="https://www6.hsmv.state.fl.us/dlcheck/findcustomer">https://www6.hsmv.state.fl.us/dlcheck/findcustomer</a></li></ul>