Figure 3.

Hourly traffic counts during the DNC (July 26–29) and during corresponding weekdays before and after the DNC, on the major north-south highways with road closures (I-93 and Route 1) and a loop road without road closures (I-95).

Levy et al. Environmental Health: A Global Access Science Source 2006 5:16   doi:10.1186/1476-069X-5-16
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