Pedestrian Critical Gap Acceptance Safety Margin Model Calculator

Quick Answer

Calculate Pedestrian Critical Gap Acceptance Safety Margin Model

Result Interpretation

Pedestrian Critical Gap Acceptance Safety Margin Model Calculator computes Critical Gap Acceptance Safety Margin in dimensionless using the defined engineering formula and the input values provided.

Worked Example

Verified calculation

Given:

Base Critical Gap (85th percentile for reference flow) = 5.8
Observed Pedestrian Critical Gap = 6.2
Gap Sensitivity Factor = 0.12

Expected Result:

Critical Gap Acceptance Safety Margin = 0.57471264367816

Engineering Interpretation:

Under the given input conditions, the calculated result is: Critical Gap Acceptance Safety Margin = 0.57471264367816 dimensionless.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.

Formula / Method

critical gap acceptance safety margin = (observed pedestrian critical gap - 85th percentile for reference flow) / (85th percentile for reference flow * gap sensitivity factor)

Formula family: formula_traffic_pedestrian_crossing_gap_acceptance_diagnostic_tool

Variables

Symbol	Label	Role	Description
observed_critical_gap	Observed Pedestrian Critical Gap	INPUT	Observed Pedestrian Critical Gap
base_critical_gap	Base Critical Gap (85th percentile for reference flow)	INPUT	Base Critical Gap (85th percentile for reference flow)
gap_sensitivity_factor	Gap Sensitivity Factor	INPUT	Gap Sensitivity Factor
critical_gap_acceptance_safety_margin	Critical Gap Acceptance Safety Margin	OUTPUT	Critical Gap Acceptance Safety Margin

Calculation Steps

Enter the observed pedestrian critical gap in s.
Enter the base critical gap (85th percentile for reference flow) in s.
Enter the gap sensitivity factor in dimensionless.
Step 1: Compute critical gap acceptance safety margin.
Read the critical gap acceptance safety margin (dimensionless) from the results.

Engineering Summary

Calculate Pedestrian Critical Gap Acceptance Safety Margin Model

Frequently Asked Questions

What does this calculator calculate?

The Pedestrian Critical Gap Acceptance Safety Margin Model Calculator estimates Critical Gap Acceptance Safety Margin based on the input parameters you provide

Why is observed pedestrian critical gap important in this calculation?

observed pedestrian critical gap is directly proportional to critical gap acceptance safety margin. When you enter observed pedestrian critical gap in s, the calculator uses it in the engineering formula to compute the output

How should I interpret the result critical gap acceptance safety margin?

The calculator outputs critical gap acceptance safety margin in dimensionless. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Observed Pedestrian Critical Gap (s), Base Critical Gap (85th percentile for reference flow) (s), Gap Sensitivity Factor (dimensionless). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment