Permanent project revision

Cool Pavement Programme

Revision 2026-08-20-source-dates · effective 2026-07-17

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

unreviewed

Created the first structured Evidence Passport with 1 claim and 3 source dossiers.

sha256:2d635b6e985af94ebd4c4aa0178e97e87f42270c594a5bbd973e860b8b19f582

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
3: source dossiers
2: publication dates recorded
1: 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-249719a9cb596719 quantitative

A peer-reviewed study (Ko et al. 2022) confirmed real daytime cooling but flagged increased reflected sunlight on pedestrians at street level.

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: The lesson repeats the finding: reflective pavement measurably lowers air and surface temperature but bounces more sunlight onto people at street level.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Ko et al. 2022, Environmental Research Letters (peer-reviewed)

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 2026-07-17 · created 2026-08-20

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

sha256:2d635b6e985af94ebd4c4aa0178e97e87f42270c594a5bbd973e860b8b19f582

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

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

Governance facts carried by the record

Operator: StreetsLA (Bureau of Street Services)
Actor types: city-government
Funding model: public
Funding description: Not recorded
Cost: ~$40,000 per lane-mile (StreetsLA); FY2023 ~$4M from the Street Damage Restoration Fee
Ownership: Not recorded
Decision rights: Not recorded
Exit conditions: Not recorded

3 source dossiers

StreetsLA / Bureau of Street Services — What We Do (authority) lastreets.lacity.org · background

Open original source ↗

Stable source ID: src-626064c869fe3928
Publisher: Name not classified · lastreets.lacity.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: 2026-07-17
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
Official StreetsLA description of the Cool Pavement programme and heat strategy.
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

Smart Cities Dive — Results of the LA cool pavement experiment (press) smartcitiesdive.com · background

Open original source ↗

Stable source ID: src-224850f5dfc85d56
Publisher: Name not classified · smartcitiesdive.com
Type / language: web-page · language not classified
Published: 2024-04-26
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-17
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
Pacoima study: up to 3.5°F cooler air in extreme heat; 175 lane-miles / 600 segments by 2023.
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

Ko et al. 2022, Environmental Research Letters (peer-reviewed) iopscience.iop.org · 1 linked claim

Open original source ↗

Stable source ID: src-1c03ba15a6804665
Publisher: Name not classified · iopscience.iop.org
Type / language: web-page · language not classified
Published: 2022-03-18
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-17
Dossier created: 2026-08-20
Retrieved copy: No local capture recorded
Archive: Open archived copy ↗ · 2026-07-31
Content hash: No captured content hash
Locator: Open the recorded source note
Neighbourhood-scale albedo/temperature measurement; documents daytime cooling and pedestrian-radiation tradeoff.
Descriptive only — not page/paragraph exact
Claims linked: clm-249719a9cb596719

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.