Examples
Examples
Try the starting example
- Repeated trip times (minutes)
- 20,22,25,30,40
- Reference free-flow travel time (minutes)
- 18
- Planning time index
- 2.111111
- Buffer time index
- 0.386861
- 95th percentile travel time (minutes)
- 38
Try another scenario
- Repeated trip times (minutes)
- [21, 22, 25, 30, 40]
- Reference free-flow travel time (minutes)
- 18
- Planning time index
- 2.111111
- Buffer time index
- 0.376812
- 95th percentile travel time (minutes)
- 38
Calculation method
Calculation method
Planning time index
Planning time index=P95/free-flow; buffer index=(P95−mean)/mean, using linearly interpolated P95.
Buffer time index
Planning time index=P95/free-flow; buffer index=(P95−mean)/mean, using linearly interpolated P95.
95th percentile travel time (minutes)
Planning time index=P95/free-flow; buffer index=(P95−mean)/mean, using linearly interpolated P95.
Symbols and units
- a
- Repeated trip times (minutes)
- b
- Reference free-flow travel time (minutes)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- User-supplied measurements and assumptions; Planning time index=P95/free-flow; buffer index=(P95−mean)/mean, using linearly interpolated P95. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.