Given the frequency and volume oftraffic that sports stadiums generate, if teams and owners back best practices, that should lead to significant progress in many cities.
Europe's business market is more limited, too: Fewer routes have enough traffic to sustain the frequencyof low-cost departures that could attract business passengers.
For decades, controllers relied on position reports over high-frequency radio every hour or so, competing for air time with fishing vessels and all kinds of other traffic.
Washington (CNN) -- A program that puts air traffic controllers in the cockpit to view life "on the other side of the frequency" is being resurrected almost a decade after it was killed by Sept. 11 security measures.
High-frequency indicators like heavy truck traffic for December fell 3.6 percent on the month, suggesting a high possibility of a negative variation in industrial production for that month.