14 Feb
2017
14 Feb
'17
2:15 p.m.
I can't help but wonder how much "science" the typical respondent actually
puts into reading the full ACS question that says:
How did this person usually get to work LAST WEEK? If this person usually used more than
one method of transportation during the trip, mark (X) the box of the one used for most of
the distance.
It could be an interesting classroom exercise to see how often a TAZ-to-TAZ report of
commuters selecting one of the transit choices did not have a viable TAZ-to-TAZ
walk-transit-walk path (although how to define "viable" would be subjective, for
people without access to an auto may sometimes walk for miles, and make three or more
transit-transit transfers). And then check to see if the non-transit drive distance to a
viable home-to-work transit path is longer than the transit path. Has anyone tried to do
that kind of test? But when it comes to understanding the nuances associated with
transit-related home to work travel that includes different modes of access/egress, the
"best bet" these days continues to be the use of a focused intercept-type
survey.
From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces@chrispy.net] On Behalf Of
polzin cutr.usf.edu
Sent: Tuesday, February 14, 2017 8:59 AM
To: ctpp-news(a)chrispy.net
Subject: Re: [CTPP] Park-Ride vs. Parking Shuttle Commutes
Remember, it also asks about usual mode last week. We have often wondered how much bias
there might be in answers as well. For example would an occasional biker want to advocate
for biking by reporting it is the usual mode? The national household travel survey
specifically asks questions about usual mode and actual mode on the day of travel and has
been used to calculate measures of mode loyalty. There is literature on that subject.
Steven E. Polzin, PhD
Director, Mobility Policy Research
Center for Urban Transportation Research
University of South Florida
polzin@cutr.usf.edu<mailto:polzin@cutr.usf.edu>
813-974-9849 (o)
813-416-7517 (c)
"If we have data, let's look at data. If all we have are opinions, let's go
with mine."
Jim Barksdale, American entrepreneur and prior CEO of Netscape
From: ctpp-news-bounces@chrispy.net<mailto:ctpp-news-bounces@chrispy.net>
[mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Marchwinski, Thomas
Sent: Monday, February 13, 2017 4:40 PM
To: ctpp-news@chrispy.net<mailto:ctpp-news@chrispy.net>
Subject: Re: [CTPP] Park-Ride vs. Parking Shuttle Commutes
We have seen evidence of people who drive the majority of their trip to a transit parking
facility and complete the final 2-10 miles on rail rapid transit to reach the CBD call
their trip auto. However, we have seen some people check "subway" when their
trip starts 10 to 40 miles from the rapid transit system, either the NYC subway or the
PATH rapid transit system, both in NY Metro area. These subway riders are mostly driving
the majority of the trip in auto, but still call the trip transit based on the last part
of the trip. The best way to determine this is to survey the transit riders at the
fringe or station parking (including asking trip purpose). Thus for any remote parking
with transit shuttle, experience in the NY area is mixed. Probably the majority of fringe
transit users are correctly identified in the census as an auto trip if the auto portion
of the trip is longer than the transit part of the trip. However a significant minority
will check transit on the census form with the final transit mode selected. This amount
varies a lot but seems to be higher for fixed guideway services like subway and commuter
rail.
Tom Marchwinski- Metro North Planning (with NJ Transit experience as well).
From: ctpp-news-bounces@chrispy.net<mailto:ctpp-news-bounces@chrispy.net>
[mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Weinberger Penelope
Sent: Monday, February 13, 2017 4:00 PM
To: ctpp-news@chrispy.net<mailto:ctpp-news@chrispy.net>
Subject: Re: [CTPP] Park-Ride vs. Parking Shuttle Commutes
Actually the question instructs you to mark the mode used for the greatest distance. So
if the drive to park and ride is shorter, the trip should be reported as transit.
From: ctpp-news-bounces@chrispy.net<mailto:ctpp-news-bounces@chrispy.net>
[mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Steve Wilson
Sent: Monday, February 13, 2017 3:55 PM
To: 'ctpp-news(a)chrispy.net'
<ctpp-news@chrispy.net<mailto:ctpp-news@chrispy.net>>
Subject: [CTPP] Park-Ride vs. Parking Shuttle Commutes
What are peoples' thoughts and experiences with the definition of auto-access transit
trips measured by ACS.
The ACS question asks "if this person usually used more than one method of
transportation during the trip, mark (X) the box of the one most often."
Are there notable experiences with people referring to a fringe parking plus remote
shuttle commute as "transit" instead of auto?