MTC worked on a study with the California Dept of Public Health to apply a model called
the Integrated Transporation Heath Impact Model (ITHIM) to examine scenarios where more
active transportation trips replaced car trips. The resulting physical activity benefits
dwarfed the improvements in air quality from cleaner modes. While it did not look at
specific geographic areas it suggests that since the burden of disease related to physical
inactivity is so large that increases in population physical activity can go a long way.
You can see the paper here:
> On Nov 5, 2013, at 10:00 AM, "<h+t--friends-request(a)chrispy.net>"
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> Today's Topics:
> 1. AQ Impacts vs Active Transport Benefits (Thera Black)
> 2. AUTO: Susan Herbel is out of the office (returning Mon
> 11/11/2013) (Susan Herbel)
> 3. Re: AQ Impacts vs Active Transport Benefits (Baldauf, Richard)
> 4. Re: AQ Impacts vs Active Transport Benefits (Baldauf, Richard)
> 5. NAACHO Seeks HIA Applications in Transportation (Ed Christopher)
> 6. Re: NAACHO Seeks HIA Applications in Transportation
> 7. Re: NAACHO Seeks HIA Applications in Transportation
> Message: 1
> Date: Mon, 4 Nov 2013 21:00:01 +0000
> From: Thera Black <blackvt(a)trpc.org>
> Subject: [H+T--Friends] AQ Impacts vs Active Transport Benefits
> To: "'h+t--friends(a)ryoko.chrispy.net'"
> Content-Type: text/plain; charset="us-ascii"
> Greetings, all - I'm reaching out to Health and Transportation listserv members
in the hopes someone can point me in a productive direction.
> I have a planning commission that is struggling with the public health
benefits/impacts of compact, walkable urban development. On the one hand they understand
and appreciate the active transportation benefits associated with this built form. On the
other hand, the epidemiologist on the commission argues that the increased impacts of air
pollution in an urban area more than offsets the benefits associated with active lifestyle
and so is working to prohibit urbanization measures along our key transit corridors -
density, mix of uses, transit oriented development.
> I can find reams of articles on the benefits of active transport. And I can find
scholarly articles about transportation-related air quality impacts on public health. What
I cannot find is anything that brings the two together in a way that sheds light about
these considerations in combination - air quality impacts trumping active transport
benefits (or vice versa). This is further complicated by the studies she is referencing
which were done in major metropolitan areas. We are a small, low-density metro area with a
population of about 175,000 between three cities. Our principal arterials carry anywhere
from 10,000 - 18,000 vehicles per day. We have very little "urban" land use form
and are trying to more effectively stimulate that kind of private sector investment along
our premier transit corridors where we have the beginnings of walkable, mixed-use
neighborhoods taking shape.
> Are you aware of any research that has looked at the trade-offs between active
transport and air quality impacts that might be useful in this regard?
> Any insights are appreciated - thank you!
> Thera Black
> Thurston Regional Planning Council
> 2424 Heritage Court SW, Ste A
> Olympia, WA 98502
> 360.956.7575 ext 2545
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