Permanent project revision

Philly Streetlight Improvement Project (Citywide LED + Lighting Management System)

Revision 2026-08-20-source-dates · effective 2026-08-02

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

unreviewed

Created the first structured Evidence Passport with 1 claim and 5 source dossiers.

sha256:8a3f42a0a3b753a77518b3546e03a88869f1c5126d8a5d945703b325f5119338

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.

1: of 1 claims mapped
5: source dossiers
4: 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-f77a06d56ff6cdd0 quantitative

34,374 of ~130,000 streetlights upgraded Aug 2023-May 2024 across 13,275 blocks were linked to a 21% reduction in outdoor nighttime gun violence, a 20% reduction in violent crime, and a 16% reduction in property crime versus not-yet-upgraded blocks

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: The snippet describes the same University of Pennsylvania Criminology & Public Policy study of the first 34,374 lights across 13,275 blocks.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

MacDonald et al. — Can enhanced street lighting improve public safety at scale?, Criminology & Public Policy

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 2026-08-20-source-dates effective 2026-08-02 · created 2026-08-20

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

sha256:8a3f42a0a3b753a77518b3546e03a88869f1c5126d8a5d945703b325f5119338

Revision history → Permanent version link → Machine-readable record → Evidence Constitution →

1: of 1 claims mapped
5: source dossiers
4: publication dates recorded
0: archives linked
0: exact locators
0: content captures hashed

Governance facts carried by the record

Operator: Philadelphia Energy Authority + City of Philadelphia Streets Department (contractor: Ameresco)
Actor types: city-government
Funding model: public
Funding description: Repaid from ~$5.4M/year in guaranteed energy savings via a Pennsylvania Guaranteed Energy Savings Act (GESA) performance contract, financed through Philadelphia Energy Authority
Cost: ~$91M citywide conversion
Ownership: Not recorded
Decision rights: Not recorded
Exit conditions: Not recorded

5 source dossiers

Philadelphia Energy Authority — Study Finds Citywide Streetlight Replacement Project Achieves 21% Reduction in Gun Violence philaenergy.org · background

Open original source ↗

Stable source ID: src-a66c8ebe152942d1
Publisher: Name not classified · philaenergy.org
Type / language: web-page · language not classified
Published: 2025-04-24
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-02
Dossier created: 2026-08-20
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Study topline figures, project scope and financing
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

Penn Crime and Justice Policy Lab — An Evaluation of Citywide Street Lighting Upgrades on Gun Violence crimejusticelab.org · background

Open original source ↗

Stable source ID: src-d74d42c405b5e240
Publisher: Name not classified · crimejusticelab.org
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-02
Dossier created: 2026-08-20
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Study design and researcher affiliation
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

MacDonald et al. — Can enhanced street lighting improve public safety at scale?, Criminology & Public Policy onlinelibrary.wiley.com · 1 linked claim

Open original source ↗

Stable source ID: src-18025a03e6cc091f
Publisher: Name not classified · onlinelibrary.wiley.com
Type / language: web-page · language not classified
Published: 2025-09-23
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-02
Dossier created: 2026-08-20
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Peer-reviewed journal publication of the crime-reduction findings, 2026
Descriptive only — not page/paragraph exact
Claims linked: clm-f77a06d56ff6cdd0

PhillyVoice — Your guide to Philadelphia's $91 million streetlight replacement project phillyvoice.com · background

Open original source ↗

Stable source ID: src-e4834e74935c8ea6
Publisher: Name not classified · phillyvoice.com
Type / language: web-page · language not classified
Published: 2025-10-28
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-02
Dossier created: 2026-08-20
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Project cost, LMS/networked-control description
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

City of Philadelphia — Construction Begins on Citywide Philly Streetlight Improvement Project phila.gov · background

Open original source ↗

Stable source ID: src-cffde453c48a86c7
Publisher: Name not classified · phila.gov
Type / language: web-page · language not classified
Published: 2023-08-08
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-02
Dossier created: 2026-08-20
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Construction start date, scope of 130,000 streetlights
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

Known limits of this passport

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.