According to PwC and American Express Global Business Travel, development has focused on large metropolitan areas, according to Amex GBT, and it’s in those spots where rate growth will slow the most. - PwC forecasts that U.S. ADR will increase 2.4% to an average of US$ 129.72 in 2018 - Amex GBT forecasts that U.S. ADR will increase 2.5% in 2018. Get the full story at Buying Business Travel