How We Collected the Data

Monday, Feb 18, 2013  |  Updated 8:18 PM EDT
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The News4 I-Team requested and/or filed a Freedom of Information Act request for the most recent traffic revenue for every light operated by the governments of Prince George’s and Montgomery Counties in Maryland, Arlington and Alexandria in Virginia and Washington, DC.

When jurisdictions only provided the number of tickets issued in a given period of time, we extrapolated the total revenue by multiplying by the fine amount. When jurisdictions only provided revenue amounts, we repeated the process by dividing the revenue by fine amount to get a total number of tickets issued.

See a map of how much money each red light camera brings in here.

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