Description
Calculate spacing between supplied rest-stop positions on an age-friendly route.
Aging research distinguishes participant and informant identities, calendar-month coordinates, time-use exposure and event/censoring status. Proxy responses and missing codes carry different meanings from direct observations. Local record summaries do not establish lifespan, legal status, accessibility or appropriate care.
Calculate spacing between supplied rest-stop positions on an age-friendly route.
When to use this tool
Use Age Friendly Route Rest Stop Spacing when checking the stated aging-study record, timing, censoring or support convention.
How to use the tool and how it works
- Enter firstStopDistance, nextStopDistance. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read spacing. Use the output convention below.
Require nonnegative first stop distance and next stop distance at least as large. Return next-first spacing.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| firstStopDistance | First Stop Distance | Required. Finite number; minimum 0. |
| nextStopDistance | Next Stop Distance | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| spacing | Spacing | Required. Finite number. |
{
"input": {
"firstStopDistance": 100,
"nextStopDistance": 250
},
"output": {
"spacing": 150
}
}Limitations and assumptions
- Distances require one route origin and unit; this does not route a journey or recommend accessible or medically suitable rest-stop spacing.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use verified original records and suitable complete research methods; involve qualified health, accessibility or legal professionals for actual care or rights decisions.
References
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