The IBM work centered on Abidjan, where 539 large buses are supplemented by 5,000 mini-buses and 11,000 shared taxis. The IBM researchers studied call records from about 500,000 phones with data relevant to the commuting question.
Mobility data is created when someone uses a phone for a call or text message. That action is registered on a cell-phone tower and serves as a report on the user’s general location somewhere within the tower’s radius. The person’s movement is then ascertained as the call is transferred to a new tower or when a new call is made that connects to a different tower.
While the data is rough—and of course not everyone on a bus has a phone or is using it—routes can be gleaned by noting the sequence of connections. And IBM and other groups have found that these mobile phone “traces” are accurate enough to serve as a guide to larger population movements for applications such as epidemiology and transportation (see “Big Data from Cheap Phones.”)
The re-routing data could help trim transit times by as much as 10 percent. Neat. (ht Hacker News)
Here’s a CNN report regarding the Ivory Coast stampede. An incredibly harrowing situation. ”My two children came here yesterday,” one woman told Reuters about the incident. “I told them not to come but they didn’t listen. They came when I was sleeping. What will I do?”
Until we can convince the population it is not a witch hunt, they won’t come forward. We’re working on it. But once the amnesty expires, we will let the law deal with anyone who doesn’t cooperate.Ivory Coast leader Alassane Ouattara • Describing some of the troubles he faces with calming down the situation in Abidjan after the capture of Laurent Gbagbo yesterday. He needs to assure that those nervous after the street violence understand that there’s a period of amnesty for those who come forward, and that things will calm down after this point. In other words: Cool your jets. It’s a pretty rough stigma to live down, as Mamadou Senogo, a person in a French refugee camp notes: “I will be staying at the French army base camp until the whole city is secure. There are too many hotheads running around with guns outside.” source (via • follow)
Gbagbo still sequestered at his home: Yesterday saw a lot of conflicting reports of the surrender, or lack thereof, of Ivory Coast’s electorally-defeated strongman Laurent Gbagbo. The standoff between him and forces loyal to the elected leader, Alassane Ouattara (who’s got other problems, too — his own ranks were accused of committing atrocities, which he flatly denies) is still going on a day later, a disastrous prolonging of the conflict for the people of Abidjan, who have little food and water, and are in tremendous physical peril. The reports coming in today, sadly, are no less convoluted than they were yesterday.
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