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Table 4 Overview of final accident prediction model forms
From: Safety assessment of Czech motorways and national roads
Model | Element type | Model equation |
|---|---|---|
Motorways | ||
M01 | - Interchange conflict points | \( \widehat{N}={\beta}_0\bullet {\left({AADT}_{major}\right)}^{\beta_1}\bullet {\left({AADT}_{minor}\right)}^{\beta_2}\bullet \exp (Type)\bullet \exp (Signal) \) |
M02 | - Interchange ramps | \( \widehat{N}={\beta}_0\bullet {AADT}^{\beta_1}\bullet {L}^{\beta_2}\bullet \exp (Curve) \) |
M03 | - Sections | \( \widehat{N}={\beta}_0\bullet {AADT}^{\beta_1}\bullet {L}^{\beta_2} \) |
National roads | ||
M04 | - 3-leg intersections | \( \widehat{N}={\beta}_0\bullet {\left({AADT}_{major}\right)}^{\beta_1}\bullet {\left({AADT}_{minor}\right)}^{\beta_2}\bullet \exp (Turn) \) |
M05 | - 4-leg intersections | \( \widehat{N}={\beta}_0\bullet {\left({AADT}_{major}\right)}^{\beta_1}\bullet {\left({AADT}_{proportion}\right)}^{\beta_2}\bullet \exp (Turn) \) |
M06 | - Roundabouts | \( \widehat{N}={\beta}_0\bullet {\left({AADT}_{sum}\right)}^{\beta_1}\bullet \exp (Legs) \) |
M07 | - Undivided sections | \( \widehat{N}={\beta}_0\bullet {AADT}^{\beta_1}\bullet {L}^{\beta_2} \) |
M08 | - Divided sections | \( \widehat{N}={\beta}_0\bullet {AADT}^{\beta_1}\bullet {L}^{\beta_2}\bullet \exp \left({\beta}_3\bullet Minor\right) \) |
Secondary roads | ||
M09 + 10 | - Intersections | \( \widehat{N}={\beta}_0\bullet {\left({AADT}_{major}\right)}^{\beta_1}\bullet {\left({AADT}_{proportion}\right)}^{\beta_2} \) |
M11 | - Sections | \( \widehat{N}={\beta}_0\bullet {AADT}^{\beta_1}\bullet {L}^{\beta_2}\bullet \exp \left({\beta}_3\bullet Minor\right) \) |