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SMART HIGHWAYS REDUCE CONGESTION AND SAVE LIVES
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Today ’ s congestion costs the economy and the environment
Across the US , state transportation departments struggle with their mission to provide safe , economical and effective transportation in the face of increasing traffic . Over the past 30 years , public road use has increased approximately 95 %, while the number of lane miles increased by only nine percent .
The resulting congestion and gridlock , especially in the country ’ s busy metropolitan areas and high traffic corridors , has a significant impact on the American economy and environment .
By 2030 traffic congestion will cost the US $ 187 billion annually , according to a 2013 study conducted by The Center for Economics and Business Research and INRIX . The cumulative cost over the 17-year period ( 2013 – 2030 ) is projected to be US $ 2.8 trillion – the same amount Americans collectively paid in US taxes in 2014 .
Traffic congestion also impacts the environment by increasing pollution as drivers slow down , speed up and idle . Emissions are much higher in these conditions than when vehicles move along at a steady speed .
A Harvard Center for Risk Analysis study of 83 US cities estimates that by 2030 emissions caused by traffic congestion could result in 1,900 premature deaths and US $ 17 billion in social costs annually . x
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