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Table 1 The meta-analytic estimates for critical headway at roundabouts [31]
From: Exploring the uncertainty in capacity estimation at roundabouts
Roundabout | Entry lane | Circulating lane | Random estimate (se) | 95% LL and UL | Z-value | p-value | Q | I 2 |
|---|---|---|---|---|---|---|---|---|
Single-lane | 4.27 (0.11) | (4.05; 4.49) | 37.46 | 0.000 | 23.28 | 1.19 | ||
Double lane | Right | 3.82 (0.13) | (3.56; 4.08) | 28.79 | 0.00 | 15.12 | 0.00 | |
Left | 4.17 (0.13) | (3.90; 4.42) | 31.24 | 0.00 | 16.78 | 0.00 | ||
Turbo (major road) | Left | 3.60 (0.06) | (3.49; 3.72) | 61.22 | 0.00 | 4.84 | 37.98 | |
Turbo (major road) | Right | 3.91 (0.25) | (3.42; 4.40) | 15.66 | 0.00 | 1.00 | 0.00 | |
Turbo (minor road) | Left | Outer | 3.07 (0.15) | (2.78; 3.36) | 20.85 | 0.00 | 2.91 | 31.22 |
Turbo (minor road) | Left | Inner | 3.20 (0.03) | (3.15; 3.26) | 106.36 | 0.00 | 1.87 | 0.00 |
Turbo (minor road) | Right | 3.83 (0.20) | (3.43; 4.23) | 18.70 | 0.00 | 10.66 | 81.23 |