Gizmodo- Stoplight with a progress bar
That is the place I found it and went through the link to the author's site. There has been quite a lot of varied opinions here, I do think that racing might become a problem, but not if these were placed on single lane intersections.
I also agree with the rotary comment. There should be more rotaries, less old people, less Buicks also
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Seriously, I think there should be a mandatory driving test two years after receiving your license (17 - 18ish) and at 65, 70 and every 2 years thereafter. That is when you are most dangerous too other drivers on the road. Even my parents are for testing, and they are getting up there in years.
Back on subject, I think these lights could be implemented at the most active intersections and save a bunch of people like us some serious mileage.
