Traffic directional split calculator

Calculate first-direction share and major-direction share with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use first-direction share and major-direction share to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

First direction vehicles (count)
600
Opposite direction vehicles (count)
400
First-direction share (%)
60
Major-direction share (%)
60
Two-way total (vehicles)
1000

Try another scenario

First direction vehicles (count)
601
Opposite direction vehicles (count)
400
First-direction share (%)
60.03996
Major-direction share (%)
60.03996
Two-way total (vehicles)
1001
Calculation method

Calculation method

First-direction share (%)

Direction counts must cover the same location and time period.

Major-direction share (%)

Direction counts must cover the same location and time period.

Two-way total (vehicles)

Direction counts must cover the same location and time period.

Symbols and units
a
First direction vehicles (count)
b
Opposite direction vehicles (count)

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; Direction counts must cover the same location and time period. 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.
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Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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