More than a quarter of the country's 40, 000-odd electric cars on the roads are located in Southern California according to Brett Williams, who directs electric-vehicle research at UCLA's Luskin School of Public Affairs, and "the single most congested situation is at LAX, " he says.

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The Games Lanes are located in one lane in either or both directions on key roads linking Olympic venues - they are in place on 30 miles of key London roads.

BBC: London 2012 Olympic Route Network Q&A

Examples include satellite maps that only show cloud cover, towns located in the wrong place, missing bodies of water, absent roads, incorrectly spelt place names and suggested driving directions that would take users on odd routes.

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The majority of usable reservoirs are located in remote, scenic wilderness areas where construction of plants, access roads, power lines and other infrastructure is perceived as an unwelcome intrusion on nature.

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This curation has pinpointed those in immediate need, warned about buildings or structures to avoid, and located clear roads.

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