Thanks Ed: I didn't want to have to correct Steve. Isn't there a total
vehicle count also somewhere in ACS? I recall using it to calc the top
category so that it all comes out right.
-----Original Message-----
From:
ctpp-news-bounces@chrispy.net [mailto:
ctpp-news-bounces@chrispy.net]
On Behalf Of Ed Christopher
Sent: Friday, May 20, 2011 6:06 PM
To:
ctpp-news@chrispy.net
Subject: Re: [CTPP] RE: private vehicle occupancy data from ACS
Don't mind Steve--he is just giving a shameless plug for the NHTS ;-)
In the ACS you can get a vehicle occupancy for people commuting to work.
It takes a little work but you can calculate it from table B8301 (mode
to work). The trick is what assumption do you use for the 5-6 people
per car (maybe 5.5) cohort and the 7+ category. In 1990 we actually
knew the factor and it was around 0.3xxx. Try a few numbers and see
what you like, 7.2 people per car; 7.3, but I would not go over 7.5
Now for another shameless plug. One of the beauties of the CTPP
tabulations is that there is a vehicle occupancy table for the work
commuters. Unfortunately, with the 3-year CTPP it is only carried out
to 1 decimal so everything is 1.1. I believe the 5-year tab due out
sometime in 2013 will have 2 decimal places.
Back to the NHTS, it's strength here is that it has all trip purposes.
Polzin, Steve wrote:
> there is no data on occupancy only household vehicle availability. The
2009 NHTS would have vehicle occupancy data.
>
> From:
ctpp-news-bounces@chrispy.net [mailto:
ctpp-news-bounces@chrispy.net]
On Behalf Of Jim Hubbell
> Sent: Friday, May 20, 2011 4:35 PM
> To:
ctpp-news@chrispy.net
> Subject: [CTPP] private vehicle occupancy data from ACS
>
> I'm trying to track down an estimate of private vehicle occupancy from the
2009 ACS 1-year estimates, and am having some difficulty finding the table
that includes this calculation. Can anyone provide me with the ACS table
number? Any help would be greatly appreciated.
>
> Thanks,
>
> Jim Hubbell
> Transportation Planner II
> Mid-America Regional Council
> 600 Broadway, Suite 200
> Kansas City, MO 64105-1659
>
816.701.8319 voice
>
816.421.7758 fax
>
>
>
>
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>
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--
Ed Christopher
708-283-3534 (V)
708-574-8131 (cell)
FHWA RC-TST-PLN
4749 Lincoln Mall Drive, Suite 600
Matteson, IL 60443
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