In 2007, the city became the first city to implement a quiet zone for the cargo-carrying trains which pass through the city regularly every day, utilizing locomotive grade crossing predictors and inter-crossing ground-based radio communications to effect a corridor where crossing gate arms become actuated prior to the train's approach, enabling trains to not be required to announce their approach by sounding the Morse Code letter "Q" on its whistle which is otherwise mandated by the Federal Railroad Administration. The city's Quiet-Zone-Update web pages offer information on the Zone's scope and any temporary or long-term alterations to the Quiet Zone.