Basil Schmid

Last Name

Schmid

First Name

Basil

ORCID

0000-0002-3310-9083

Organisational unit

01109 - Lehre Bau, Umwelt und Geomatik

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Publications 1 - 10 of 26

Route choice modelling for cyclists on urban networks
Meister, Adrian; Felder, Matteo; Schmid, Basil; et al. (2023)
Transportation Research Part A: Policy and Practice
This paper presents the results of route choice models for cyclists in the city of Zurich. The data includes approx. 4400 cycling trajectories, including approx. 850 from e-bikes. The network is sourced from Open Street Map (OSM) and the choice set generation is based on the breadth-first search on link elimination (BFSLE) algorithm. We present descriptive statistics and model results which specifically point out the difference between regular and e-bikes. We provide results of a simple path size Logit (PSL) and a more complex mixed PSL, both estimated in Value-of-Distance (VoD) space, and both suited to directly derive VoD indicators. The results show anticipated effects for cycling infrastructure, speed limits, traffic signals, gradients and traffic volumes. Numerous interaction effects shed light on the taste heterogeneity.
mixl
Molloy, Joseph; Becker, Felix; Schmid, Basil; et al. (2021)
Journal of Choice Modelling
This paper introduces mixl, a new R package for the estimation of advanced choice models. The estimation of such models typically relies on simulation methods with a large number of random draws to obtain stable results. mixl uses inherent properties of the log-likelihood problem structure to greatly reduce both the memory usage and runtime of the estimation procedure for specific types of mixed multinomial logit models. Functions for prediction and posterior analysis are included. Parallel computing is also supported, with near linear speedups observed on up to 24 cores. mixl is directly accessible from R, available on CRAN. We show that mixl is fast, easy to use, and scales to very large datasets. This paper presents the architecture and performance of the package, details its use, and presents some results using real world data and models.
In-store or online grocery shopping before and during the COVID-19 pandemic
Meister, Adrian; Winkler, Caroline; Schmid, Basil; et al. (2020)
Arbeitsberichte Verkehrs- und Raumplanung
This paper presents results of a stated choice (SC) experiment to uncover the determinants of grocery shopping channel choice during this first wave of widespread COVID-19 infections where the most restrictive containment measures were in place, making the dataset unique. The choice sets were framed under regular and pandemic conditions, allowing the estimation of pandemic-specific effects for each of the choice attributes. Our results show a significant overall increase of about 13%-points in online grocery shopping under pandemic conditions. Shopping and delivery costs were found to be the major decision drivers in both experimental settings, while the waiting time in front of the grocery store and risk of infection only played an secondary role. The value of delivery time savings (VDTS) decreases from about 10.8 CHF/day in the regular to 7.4 CHF/day in the pandemic case, indicating that respondents show an increased patience when waiting for the delivery of the ordered groceries. However, choice attributes related to the shopping trip, i.e. travel time and cost, do not show any notable effects in both conditions. However, the COVID-19 death risk was valued rather low by the respondents, and the relatively unrestricted Swiss containment measures are in line with the respondents’ average preferences, as shown by a relatively low value of statistical life (VSL) of about 800,000 CHF.
Route choice modelling for cyclists on dense urban networks
Meister, Adrian; Felder, Matteo; Schmid, Basil; et al. (2022)
Arbeitsberichte Verkehrs- und Raumplanung
This paper presents the results of route choice models for cyclists in the city of Zurich. The data includes approx. 4400 cycling trajectories, including approx. 850 from e-bikes. The network is sourced from OSM and the choice set generation is based on a modified version of the BFSLE algorithm. We present descriptive statistics as well as the model results which specifically point out the difference between regular and e-bikes. We provide results of both a simple MNL and a more complex mixed Logit, both estimated in Value-of-Distance (VoD) space, and both suited to directly derive VoD indicators. The results show anticipated effects for cycling infrastructure, speed limits, traffic signals, gradients and traffic volumes. Numerous socio-demographic interaction effects shed light on the taste heterogeneity.
The value of travel time (VTT) in Switzerland
Schmid, Basil (2022)
Route choice modelling for cyclists on dense urban networks
Meister, Adrian; Felder, Matteo; Schmid, Basil; et al. (2023)
TimeUse+
Winkler, Caroline; Meister, Adrian; Schmid, Basil; et al. (2021)
Route choice modelling for cyclists on dense urban networks
Meister, Adrian; Felder, Matteo; Schmid, Basil; et al. (2022)
The value of travel time savings and the value of leisure in Zurich
Schmid, Basil; Molloy, Joseph; Peer, Stefanie; et al. (2021)
Transportation Research Part A: Policy and Practice
We use state-of-the art estimation approaches to obtain mode-specific values of travel time savings (VTTS) based on pooled RP/SP travel choice data of Zurich workers. Unlike the large majority of time valuation studies, we also have data on the respondents’ time-use and expenditure allocation, which enables us to estimate their value of leisure (VoL),i.e. the opportunity value of liberated time when the duration of a committed activity, such as travel, is reduced. We use the estimates of the VoL and the VTTS to derive the value of time assigned to travel (VTAT) – the monetary value of the direct (dis-)utility derived from the conditions experienced while traveling. Linking the VTTS and VoL at the individual-level allows for a detailed analysis of VTAT distributions. We obtain median VTTS for car and motorbike (MIV) of 30.6 CHF/h, carpooling (CP) of 27.7 CHF/h, carsharing (CS) of 26.7 CHF/h, walk of 26.7 CHF/h, bike of 18.2 CHF/h and public transportation (PT) of 14.8 CHF/h. The median VoL amounts to 25.2 CHF/h. We find that MIV, CS and CP perform worst in terms of VTAT (as indicated by values smaller than zero), showing that the perceived travel comfort all in car modes (private, shared and pooled) is substantially lower than for PT and bike, where the VTAT are greater than zero. From a transportation policy perspective, our results suggest that travel comfort matters greatly and investing in the quality of travel should therefore obtain more attention. However, from a PT operator’s point of view, our results indicate that in the case of Zurich, investing in faster connections may exhibit a higher marginal impact on user benefits, since the VoL is relatively high, while travel comfort is perceived as high already.
New Swiss value of time
Schmid, Basil (2022)

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Basil Schmid

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