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Are there scientific reasons for the lower speed limits in non-attainment areas?

April 26, 2017areas limits lower non-attainment reasons scientific speed

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Are there scientific reasons for the lower speed limits in non-attainment areas?

1 Answer

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10 Posted

Yes. Research on which the current state implementation plans (SIP) are based indicates that vehicle NOx emissions—precursors of ground-level ozone and smog—increase steadily and predictably at speeds over 45 mph. The commission will continue to study the effects of reduced speed limits on quality benefits as more science becomes available.