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Table 3 The parameters of the sample distribution for the critical and the follow-up headways (Q e = 0.5·C)
From: Exploring the uncertainty in capacity estimation at roundabouts
Roundabout | Entry | Entry lane | Circulating lane | Mean [s] | \( \frac{\sigma}{\sqrt{n}} \) | [s] |
|---|---|---|---|---|---|---|
Critical headway | ||||||
Single-lane | 4.27 | 0.43 | ||||
Double-lane | Right | 3.82 | 0.49 | |||
Left | Inner | 4.17 | 0.49 | |||
Outer | 3.81 | 0.49 | ||||
Turbo | Major | Left | 3.60 | 0.31 | ||
Turbo | Major | Right | 3.91 | 0.47 | ||
Turbo | Minor | Left | Inner | 3.20 | 0.18 | |
Outer | 3.07 | 0.27 | ||||
Turbo | Minor | Right | 3.83 | 0.41 | ||
Follow-up headway | ||||||
Single-lane | 3.10 | 0.53 | ||||
Double-lane | Left | 2.85 | 0.45 | |||
Double-lane | Right | 2.72 | 0.44 | |||