Research Collection
Other Conference Item
Response rates of longer duration studies
Author(s):
Axhausen, Kay W.
Publication Date:
2021-01
Permanent Link:
https://doi.org/10.3929/ethz-b-000460247
Rights / License:
In Copyright - Non-Commercial Use Permitted
This page was generated automatically upon download from the ETH Zurich Research Collection. For more information please consult the Terms of use.
ETH Library
Preferred citation style
Axhausen, K.W. (2021) Response rates of longer duration studies, Subcommittee meeting „Household travel surveys EAB25 (1) “, TU TRB, zoom, January 2021.
TRB 21
Response rates of longer duration studies
J Molloy B Schmid
KW Axhausen IVT
ETH Zürich
January 2021
Response rate R1 – IVT surveys
TRB 21
Source:SchmidandAxhausen, 2019
Rates
Source:Molloy,2021
Example: 2019 MOBIS – 100 sFr incentive for 8 weeks
TRB 21
Stage Number Share [%]
Invited 90’900 100
Intro/screening survey 21’600 24
Qualified 6’900 8
Registered 5’400 6
Started 4’200 5
Completed 3’700 4
Example: 2019 MOBIS – MOBIS/COVID19
Source:Molloy,2021
Appendix: MOBIS-COVID19 in 2020
TRB 21
MOBIS COVID19 sample
MOBIS/COVID19 sample
• 1300+ started to track again after our invitation
• No incentives; just volunteers
• 3 short surveys addressing work and work location, deliveries, and health
• Second invite for the second wave
• Further recruitment of new participants with LINK
TRB 21
MOBIS/COVID19 sample since March 2020
Source:Molloy et al., 2021
MOBIS/COVID19: Out-of-home share
TRB 21
Mobile person by day
0%
25%
50%
75%
100%
0 28 56 84 112 140 168 196 224 252 280 308 336 364
Mobile persons [%]
Day of year
MOBIS control group COVID19 2020
Data: Molloy et al., 2021
MOBIS/COVID19: PKm, trips and activity spaces
TRB 21
PKm by sex
Source:Molloy et al., 2021
Δ% change in VMT for “furloughed” participants
TRB 21
Source:Molloy et al., 2021
Δ% change in trips by work location: WFH impact?
-75%
-50%
-25%
0%
25%
02.03 30.03 27.04 25.05 22.06 20.07 17.08 14.09 12.10 09.11 07.12
% change in PKm against baseline
Home office Mixed On-site
Data: Molloy et al., 2021
Δ% of number of trips and size of activity space
TRB 21
0 1 2 3 4 5
0 100 200 300 400 500
Baseline-2019 Mar.09 Mar.23 Apr.06 Apr.20 May.04 May.18 Jun.01 Jun.15 Jun.29 Jul.13 Jul.27 Aug.10 Aug.24 Sep.07 Sep.21 Oct.05 Oct.19 Nov.02 Nov.16 Nov.30 Dec.14 Number of trips/day
Activity space [km2]
Week starting with Monday
Weekday - Activity space Weekend ..
Weekday - Trips Weekend ..
Data: Molloy et al., 2021
MOBIS/COVID19: Mode choice
Working day Pkm by mode and phase of the pandemic
TRB 21
SourceMolloy et al., 2021
MOBIS/COVID19: PKm change by mode
-100%
-50%
0%
50%
100%
150%
200%
250%
Baseline 09.03.20 23.03.20 06.04.20 20.04.20 04.05.20 18.05.20 01.06.20 15.06.20 29.06.20 13.07.20 27.07.20 10.08.20 24.08.20 07.09.20 21.09.20 05.10.20 19.10.20 02.11.20 16.11.20 30.11.20 14.12.20
% change
Week starts at
Bike Walking Bus Tram Train Car All
Data: Molloy et al., 2021
COVID19 door-to-door car speeds
TRB 21
SourceMolloy et al., 2021
Questions ?
ivtmobis.ethz.ch/mobis/covid19/
www.ivt.ethz.ch
References
Molloy, J. (2021) UNDERTAKING MOBILITY FIELD EXPERIMENTS USING GPS TRACKING, PhD thesis, ETH Zürich, Zürich.
Molloy, J., C. Tchervenkov, T. Schatzmann, B. Schoeman, B. Hintermann and K.W.
Axhausen (2020) MOBIS-COVID19/31: Results as of 28/12/2020 (second wave), Arbeitsberichte Verkehrs- und Raumplanung, 1585, IVT, ETH Zurich, Zurich
Schmid, B. and K.W. Axhausen (2019) Predicting response rates of all and recruited respondents: A first attempt, Transport Findings, https://doi.org/10.32866/7827
TRB 21
