Watch 'Real-Time' Transit Planning Help North America's Busiest Bus Line

Vancouver has a problem with its 99 Broadway bus that most cities would envy: it's too popular. The 99 is part of a Broadway bus corridor that's considered the busiest in North America, carrying about 100,000 riders a day. At some stops, despite coming every few minutes during morning rush, the buses hardly put a dent in the lines of passengers awaiting the next one.

So that's a good problem, but it's still a problem — especially at the stop outside the Broadway-Commercial SkyTrain station. Here, commuters leaving the train station to catch the 99 fork into three lines to board the front, middle, and rear bus entrances. But these lines can get so long they curl around the block back into the train station (below, the bus is at the far right):