Tom Marchwinski asked about more detailed public transit data in the ACS
tables.
More detailed transit tabulations ARE included. You have to go to
"detailed tables"
Residence Geography
Tables B08006 sex by means of transportation (21)
B08134 means of transportation (12) by travel time (10)
Workplace Geography
Table B08406 sex by means of transportation (21)
B08534 means of transportation (12) by travel time (10)
The category of 12 include:
Public Transportation (total, excluding taxi)
Public Trans: bus or trolley bus
Public Trans: streetcar, trolley car, subway or elevated
Public Trans: railroad or ferryboat
The category of 21 includes:
Public Transportation (total, excluding taxi)
Public Trans: bus or trolley bus
Public Trans: streetcar, trolley car,
Public Trans: subway or elevated
Public Trans: railroad
Public Trans: ferryboat
Also, Tom asked about "light rail". USDOT had an opportunity to ask
the CB to test revisions to the ACS questionnaire itself, and there was
discussion about asking to add the phrase "light rail" to the response
list, however, at that time, USDOT did NOT make that request to the CB.
There were some cost implications for testing revisions.
BTW, Celia Boertlein of the CB will be posting to the listserv,
reminding people that Workplace tabulations WERE included in the 2004
ACS tables. I was remiss in mentioning this in my earlier email,
because only about one-third of counties were included in the 2004
sample. Celia's email will be more detailed.
_____
From: TMarchwinski(a)njtransit.com [mailto:TMarchwinski@njtransit.com]
Sent: Wednesday, August 02, 2006 12:44 PM
To: Murakami, Elaine
Subject: RE: [CTPP] Get ready-- 2005 ACS data coming soon-- August 15
and 29
Elaine- I looked at the ACS survey, and they do get data on individual
modes, however all of the ACS data I have ever seen shows just a summary
for "Public Transit", which unfortunatly includes taxi. Do you know if
ACS will make available for the new JTW data breakouts of public transit
to exclude taxi, or to show some individual modes? I realize because of
the smaller sample size, and cofidence limits, it is hard to have a
breakout of individual modes unless there are a significant number of
mode specific transit trips. We in New Jersey have areas where a bus
mode vs. total transit breakout would be very helpful, espcecially since
we have built two new light rail lines since 2000. Is there anyone at
Census I could talk to about this, and is there any procedure for
getting a breakdown of public transit modes if we made a special
request, since I suspect the raw weighted data is there to estimate
this. I think I brought this up a couple of years ago, same for
including "Light Rail" as a mode as part of streetcar, since streetcar
is not really used very much, but light rail is. I have taken a web
based course in ACS, so I am a bit more familiar with it now. If you
could give me contacts on this or some direction on if this is available
(ie mode breakdown). Even if this was confined to MSA's over 1 million
it would be helpful to us to track mode shifts and submodes. THanks.
Tom Marchwinski, NJ TRANSIT, Director of Forecasting.