01 · OBSERVE
Gather good evidence
A guided capture process helps non-experts document an asset safely and consistently.
Tennessee field proving · Early build
A common reference for safer roads.
Ground Datum is building an open, continuously refreshed record of roadside safety infrastructure, so communities and road agencies can see what exists, what changed, and what needs another look.
OBSERVATION ≠ INSPECTION · UNCERTAINTY IS RECORDED · OPEN PUBLICATION IS THE INTENT
CUMBERLAND COUNTY · WORKING MAP
TN-CUM-004821
Guardrail run
Evidence requested
One shared record
Observation becomes useful when it can improve.
A photo on a complaint form disappears into a queue. Ground Datum preserves each observation, adds calibrated review, records uncertainty, and follows reported work through independent repair verification.
02 · REVIEW
Calibrate the finding
Independent reviewers classify what is visible, state confidence, and request what is missing.
03 · ACT
Give agencies a path
Road teams can acknowledge, dispute, schedule, or document work inside the same record.
04 · VERIFY
Close the loop
Fresh independent evidence can verify reported work and preserve the complete public history.
The posture
Built for action,
not blame.
The people most willing to build this map may be families who already know the cost of missing visibility. The fastest route to safer roads is turning that care into high-quality evidence and treating road agencies as partners in the fix.
For families and communities
Build a durable record that can help prevent another loss without turning grief into spectacle or every observation into an accusation.
SO THIS DOESN'T HAPPEN TO SOMEONE ELSE
For road agencies
Help shape a field-documented inventory of assets your team maintains, with freshness, evidence quality, and a disposition workflow designed around limited staff.
SEE SOONER · PRIORITIZE BETTER · VERIFY THE FIX
One public record. Better evidence. More visible repairs.THE GROUND DATUM PROMISE
Open by design
The public builds it. The public keeps it.
Ground Datum is being developed as a public-infrastructure commons. The project intends to publish approved public records under open terms after privacy, licensing, and governance gates are complete. Future agency software would sell workflow, integration, and support rather than exclusive access to volunteer-built public data.
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Original evidence retained
Files, timestamps, transformations, reviewers, and model versions remain traceable.
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Uncertainty stays visible
“Insufficient evidence” is useful information, not a failed task.
→
Every change has history
Maps and scores are projections. The event log is the durable record.
∞
Open publication is the mission lock
The planned Foundation is intended to steward approved open data and standards after formation, assignment, and board and counsel approval.
Operational proving ground
Prove the complete evidence loop in Cumberland County.
Field alpha starts with guardrails in Tennessee so safety, moderation, calibration, agency response, and public resolution history can be measured under real conditions before nationwide public rollout. Geographic completion is not the launch criterion.
READINESS TARGET
FULL LOOP
Safe capture → moderation → calibrated review → agency or expert disposition → public resolution history, with real throughput and failure evidence.