Level of Service Delay Calculator

Classify actual observed control delay with independently verified facility/edition inclusive class edges; no universal LOS thresholds or computed queue delay. Caller independently establishes units, regime, calibration and applicability; this does not establish design-code compliance, authenticity, operational safety, treatment efficacy or a validated forecast.

Description

Delay classification compares observations with ordered inclusive upper edges.

Delay classification compares observations with ordered inclusive upper edges.^[1]

The caller's categories need context and do not install universal level-of-service thresholds. Use this tool to calculate level of Service Delay from the supplied measurements and assumptions.

When to use Level of Service Delay Calculator

Use this tool to calculate level of Service Delay from the supplied measurements and assumptions. Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.

How to use Level of Service Delay Calculator and understand its results

Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.
Enter observedControlDelaysSeconds, callerInclusiveDelayClassUpperSeconds, using the field meanings and rules below, then run the tool.
Read callerDelayClassIndices. Interpret the fields using their units, signs and evidence conventions below.
If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.

Input field	Meaning	Value type	Requirement
observedControlDelaysSeconds	Observed control delays seconds	list of number	Required
callerInclusiveDelayClassUpperSeconds	Caller inclusive delay class upper seconds	list of number	Required

Enter nonnegative delays and at least one strictly increasing nonnegative upper category edge in matching time units. For each delay return the zero-based first edge whose value≥delay; values above all edges get index=edgeCount. Equality stays in the lower category; no A–F labels or installed traffic thresholds are supplied.

categoryIndex_i=first j with delay_i≤upperEdge_j, else edgeCount

Use the exact units, boundary rules, ordering and missing-evidence conventions above.

Output field	Meaning	Value type
callerDelayClassIndices	Caller Delay Class Indices; follow the units, sign, ordering and evidence convention stated above	list of number

json

{
  "input": {
    "observedControlDelaysSeconds": [
      5,
      20,
      40
    ],
    "callerInclusiveDelayClassUpperSeconds": [
      10,
      30,
      50
    ]
  },
  "output": {
    "callerDelayClassIndices": [
      0,
      1,
      2
    ]
  }
}

Limitations and assumptions

The caller's categories need context and do not install universal level-of-service thresholds. Interpretation depends on the units, sampling scope and exact model described above.

All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.

Alternative or Complementary methods

Use Webster Signal Timing Calculator for this related task: Webster's cycle model relates lost time to independently established critical flow ratios.

Use Roundabout Capacity Calculator when its separate inputs and assumptions fit the question: A gap-acceptance roundabout model relates conflicting flow to critical and follow-up gaps.

References

Level of Service Delay Calculator — tool.io

Similar or alternative tools

Webster Signal Timing Calculator
Webster's cycle model relates lost time to independently established critical flow ratios.
Roundabout Capacity Calculator
A gap-acceptance roundabout model relates conflicting flow to critical and follow-up gaps.