1001 Smart Cities

Permanent project revision

HSL Open Transit Data & the Digitransit Platform

Revision 2026-10-05-baseline · effective 2026-10-05

Current revision. This is the snapshot used by the live entity page.

unreviewed

Created the first structured Evidence Passport with 8 claims and 6 source dossiers.

sha256:8dfdfa222f90d4dd272a0bb1ae12c6261eb88537270a50d76dff9e3efc8d2547
All revisions → Current entity page →

Change set

  • add /evidencePassport — Added claim-level evidence mapping and source dossiers.
  • add /revisionHistory — Established a permanent, hash-addressed baseline revision.
8
of 8 claims mapped
6
source dossiers
2
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Claims, one by one

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-e40d20aa257c4272 quantitative
HSL opened its Journey Planner (Reittiopas) interface to developers in 2009-10
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
HRI history: in 2008 developers discovered the existing interface; in 2009 the Apps4Finland organisers asked HSL about open interfaces and 'the decision is taken to make the interface public and to document it'; in 2010 'the open interface to its data is made public'. The HRI catalogue entry for the API dates from 16 March 2011.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Helsinki Region Infoshare — Helsinki Region's Public Transport Data (2 years of open data, 2013)
  2. Helsinki Region Infoshare (authority)
Claim 3 clm-ad2fcfd66f83cb35 quantitative
HSL went on to co-develop Digitransit, an open-source journey-planning platform released in 2017
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Forum Virium (2019): Digitransit 'has been developed in Finland by HSL, LMJ and Traficom' and is open source. The 2017 release year comes from the European Commission's OSOR case study.
Caveat
The 2017 date rests on the OSOR case study alone; HSL's public-transport data was already running through Digitransit services alongside the older Reittiopas before then.

Sources carrying this claim

  1. European Commission Interoperable Europe (independent)
  2. Forum Virium Helsinki — Estonia adopts journey planning service first developed in Helsinki (19 Aug 2019)
Claim 4 clm-ba04c0f7824c2ccf descriptive
now run by HSL, Fintraffic and Waltti Solutions
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Fintraffic: 'The journey planner service is produced, maintained and developed in a collaboration between HSL, Waltti Solutions Oy and Fintraffic.'
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Fintraffic — Digitransit
Claim 5 clm-da4286b3e3c03fa9 descriptive
which Estonia, several German cities and Oklahoma City also use
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Forum Virium (2019): Estonia's Road Administration (Maanteeamet) began using Digitransit for its journey planner. The OSOR case study lists further instances in German cities (Herrenberg, Ludwigsburg, Aachen, Brandenburg) and Oklahoma City.
Caveat
Oklahoma City rests on the OSOR case study alone; the local transit agency's own materials describe a trip planner without naming Digitransit.

Sources carrying this claim

  1. Forum Virium Helsinki — Estonia adopts journey planning service first developed in Helsinki (19 Aug 2019)
  2. European Commission Interoperable Europe (independent)
Claim 6 clm-40d19100fb1f78cf descriptive
Helsinki's first step was cheap because the interface already existed: someone only had to tell developers about it
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
HRI: the Reittiopas service 'already had open data interfaces created previously. It was easy to get started with the unlocking of data: one had to simply tell others about the interface, although it had been originally designed for internal use.' HSL's manager: 'I only needed the approval of my superior and enough funding.'
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Helsinki Region Infoshare — Helsinki Region's Public Transport Data (2 years of open data, 2013)
Claim 7 clm-0ec3f0db08f0eb48 descriptive
Estonia's road administration adopted it expecting lower costs and a quicker timeframe
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Forum Virium: Kaspar Karm of Maanteeamet: 'We're delighted to be starting technical and business cooperation, allowing us to benefit from Finnish knowledge and experience to deliver a new journey planner in Estonia with lower costs and a quicker timeframe.'
Caveat
An expectation stated at adoption, not a measured saving.

Sources carrying this claim

  1. Forum Virium Helsinki — Estonia adopts journey planning service first developed in Helsinki (19 Aug 2019)
Claim 8 clm-3599545a823fa9fc descriptive
every adopter's improvements flow back to the others
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Forum Virium's project manager Jari Honkonen: 'In an open platform all development results will be shared with others, therefore it is to everyone's benefit to have more partners who can participate in common development.'
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Forum Virium Helsinki — Estonia adopts journey planning service first developed in Helsinki (19 Aug 2019)

Source dossiers and revision state

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-10-05-baseline effective 2026-10-05 · created 2026-10-05

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:8dfdfa222f90d4dd272a0bb1ae12c6261eb88537270a50d76dff9e3efc8d2547
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
8
of 8 claims mapped
6
source dossiers
2
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
HSL (Helsingin seudun liikenne)
Actor types
utility
Funding model
public
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

6 source dossiers

Helsinki Region Infoshare (authority) hri.fi · 1 linked claim

Open original source ↗

Stable source ID
src-72d29596abde31cf
Publisher
Name not classified · hri.fi
Type / language
web-page · language not classified
Published
2011-03-16
Updated
2023-03-28
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Official open-data catalogue entry for the Reittiopas/Journey Planner API.

Descriptive only — not page/paragraph exact
Claims linked
European Commission Interoperable Europe (independent) interoperable-europe.ec.europa.eu · 2 linked claims

Open original source ↗

Stable source ID
src-6b166a7737f3ae3b
Publisher
Name not classified · interoperable-europe.ec.europa.eu
Type / language
pdf · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Digitransit's 2017 release, HSL/Fintraffic/Waltti Solutions development, and adoption in Estonia, Germany and Oklahoma City.

Descriptive only — not page/paragraph exact
Claims linked
Digitransit (operator) fintraffic.fi · background

Open original source ↗

Stable source ID
src-a250668c19e195db
Publisher
Name not classified · fintraffic.fi
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Current, actively maintained routing/GTFS API documentation confirming the platform is still live.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Helsinki Region Infoshare — Helsinki Region's Public Transport Data (2 years of open data, 2013) hri.fi · 3 linked claims

Open original source ↗

Stable source ID
src-9a8828755bdebea8
Publisher
Name not classified · hri.fi
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Timeline of the Journey Planner interface: discovered by developers in 2008, opened and documented after the 2009 Apps4Finland enquiry, made public in 2010, 600 registered API users by May 2012. HSL's project manager puts the cost of the open interfaces at about €60,000 over three years for the Journey Planner, against about €5 million for the whole service.

Descriptive only — not page/paragraph exact
Claims linked
Fintraffic — Digitransit fintraffic.fi · 1 linked claim

Open original source ↗

Stable source ID
src-e8c4bd388a17a340
Publisher
Name not classified · fintraffic.fi
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fintraffic: Digitransit is produced, maintained and developed by HSL, Waltti Solutions and Fintraffic; most public-transport journey planners in Finland are built on it; open-source code and open data interfaces.

Descriptive only — not page/paragraph exact
Claims linked
Forum Virium Helsinki — Estonia adopts journey planning service first developed in Helsinki (19 Aug 2019) forumvirium.fi · 4 linked claims

Open original source ↗

Stable source ID
src-f90d6285c29f392d
Publisher
Name not classified · forumvirium.fi
Type / language
web-page · language not classified
Published
2019-08-19
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Estonia's Road Administration (Maanteeamet) adopts Digitransit for its national journey planner, expecting 'lower costs and a quicker timeframe'; in an open platform 'all development results will be shared with others'.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this file
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.