traveltime: Calculate Travel Times Over Space

Calculate travel time across a landscape from a set of user-specified locations, over a friction surface describing the time taken to cross each cell. Implements the least-cost travel time approach of Weiss et al. (2018) <doi:10.1038/nature25181> and Weiss et al. (2020) <doi:10.1038/s41591-020-1059-1>, and provides convenient access to their global walking and motorised friction surfaces via the 'malariaAtlas' package. Travel times are computed with 'terra'. See Ryan et al. (2025) <doi:10.12688/gatesopenres.16356.1> for further details.

Version:	1.0.0
Depends:	R (≥ 4.1.0)
Imports:	cli, malariaAtlas, terra
Suggests:	geodata, ggplot2, knitr, rmarkdown, testthat (≥ 3.0.0), tidyterra
Published:	2026-10-31
DOI:	10.32614/CRAN.package.traveltime (may not be active yet)
Author:	Gerry Ryan [aut, cre], Daniel Weiss [aut], Nicholas Tierney [ctb]
Maintainer:	Gerry Ryan <gerry.ryan at thekids.org.au>
BugReports:	https://github.com/idem-lab/traveltime/issues
License:	MIT + file LICENSE
Copyright:	The 'stations' data contains information from the Land Transport Authority of Singapore, made available under the Singapore Open Data Licence version 1.0; see ?stations.
URL:	https://idem-lab.github.io/traveltime/, https://github.com/idem-lab/traveltime
NeedsCompilation:	no
Language:	en-GB
Citation:	traveltime citation info
Materials:	README, NEWS
CRAN checks:	traveltime results

Documentation:

Reference manual:	traveltime.html , traveltime.pdf
Vignettes:	A practical example: walking from public transport in Singapore (source)

Downloads:

Package source:	traveltime_1.0.0.tar.gz
Windows binaries:	r-devel: not available, r-release: not available, r-oldrel: not available
macOS binaries:	r-release (arm64): traveltime_1.0.0.tgz, r-oldrel (arm64): traveltime_1.0.0.tgz, r-release (x86_64): traveltime_1.0.0.tgz, r-oldrel (x86_64): traveltime_1.0.0.tgz

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