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Table 2 Selected models for segments
Predictor | Estimate | Std. Error | z- value | p-value |
|---|---|---|---|---|
All segments | ||||
(Intercept) | −6.054 | 0.728 | −8.318 | < 0.001 |
Ln (AADT) | 0.375 | 0.084 | 4.449 | < 0.001 |
Ln(L) | 0.292 | 0.060 | 4.907 | < 0.001 |
Type of lanes 1: > 1 (reference: 1 lane) | 0.079 | 0.167 | 0.470 | 0.638 |
Type of lanes 2: 1 + 1 (ref.: 1 lane) | 0.524 | 0.151 | 3.471 | < 0.001 |
Type of lanes 3: > 1 + 1 (ref.: 1 lane) | 0.707 | 0.181 | 3.906 | < 0.001 |
Vertical signs on driveways/minor roads (Yes - ref.: No) | 0.652 | 0.110 | 5.943 | < 0.001 |
Poor maintenance of pavements (Yes - ref.: No) | −0.268 | 0.114 | −2.348 | 0.019 |
Parking type 1: At one side (ref.: No parking) | 0.218 | 0.131 | 1.668 | 0.095 |
Parking type 2: At both sides (ref.: No parking) | 0.258 | 0.126 | 2.053 | 0.040 |
Parking type 3: Mixed (ref.: No parking) | −1.092 | 0.556 | −1.964 | 0.050 |
Cycle paths (Yes – ref.: No) | 0.308 | 0.182 | 1.694 | 0.090 |
Goodness-of-fit measures | ||||
LRT (reference: null model) = 200.96 (df = 11), p < .001; LRT (reference: full model) = 6.64 (df = 11), p = .828 | ||||
Nagelkerke R2 = 0.158, AIC = 2609.9 | ||||
Over-dispersion parameter (theta) = 1.08 (std. error: 0.17) | ||||
Interval of continuous predictors | ||||
AADT: 300–29,960 vehicles/day, L: 30–1510 m | ||||
One-way segments | ||||
(Intercept) | −8.794 | 0.961 | −9.151 | < 0.001 |
Ln (AADT) | 0.695 | 0.108 | 6.434 | < 0.001 |
Ln(L) | 0.333 | 0.095 | 3.505 | < 0.001 |
Driveways/minor roads per km | 0.010 | 0.003 | 3.163 | 0.002 |
Vertical signs on accesses/minor roads (Yes - ref.: No) | 0.477 | 0.169 | 2.825 | 0.005 |
Poor maintenance of pavements (Yes - ref.: No) | −0.497 | 0.159 | −3.137 | 0.002 |
Goodness-of-fit measures | ||||
LRT (reference: null model) = 101.68 (df = 5), p < .001; LRT (reference: full model) = 9.77 (df = 10), p = .460 | ||||
Nagelkerke R2 = 0.153, AIC = 1226.8 | ||||
Over-dispersion parameter (theta) = 1.01 (std. error: 0.26) | ||||
Interval of continuous predictors | ||||
AADT: 300–22,600 vehicles/day, L: 30–1510 m, Density of driveways/minor roads: 0.0–142.9 number/km | ||||
Two-way segments | ||||
(Intercept) | −3.764 | 1.122 | −3.356 | < 0.001 |
Ln (AADT) | 0.134 | 0.117 | 1.140 | 0.254 |
Ln(L) | 0.310 | 0.079 | 3.944 | < 0.001 |
Vertical signs on accesses/minor roads (Yes - ref.: No) | 0.432 | 0.141 | 3.074 | 0.002 |
Markings 1: Illegible (ref.: No/partially absent/illegible) | 0.317 | 0.177 | 1.791 | 0.073 |
Markings 2: Yes (ref.: No/partially absent/illegible) | 0.309 | 0.175 | 1.767 | 0.077 |
Parking type 1: At one side (ref.: No parking) | 0.287 | 0.156 | 1.836 | 0.066 |
Parking type 2: At both sides (ref.: No parking) | 0.441 | 0.152 | 2.903 | 0.004 |
Parking type 3: Mixed (ref.: No parking) | −0.973 | 0.640 | −1.521 | 0.128 |
Goodness-of-fit measures | ||||
LRT (reference: null model) = 57.69 (df = 7), p < 0.001; LRT (reference: full model) = 5.63 (df = 7), p = 0.584 | ||||
Nagelkerke R2 = 0.102, AIC = 1369.2 | ||||
Over-dispersion parameter (theta) = 1.32 (std. error: 0.29) | ||||
Interval of continuous predictors | ||||
AADT: 1160–29,960 vehicles/day, L: 30–1415 m | ||||