An Open Access Journal
Table 3 Numbers of elements and descriptive characteristics of their accident data
From: Safety assessment of Czech motorways and national roads
Element type | Number | Accident frequency | |||
|---|---|---|---|---|---|
Min. | Max. | Mean | Sum | ||
Motorways | |||||
- Interchange conflict points | 2550 | 0 | 172 | 2.39 | 6095 |
- Interchange ramps | 3636 | 0 | 178 | 3.03 | 11,029 |
- Sections | 382 | 1 | 283 | 55.97 | 21,381 |
National roads | |||||
- 3-leg intersections | 536 | 0 | 46 | 5.51 | 2956 |
- 4-leg intersections | 92 | 1 | 62 | 12.70 | 1168 |
- Roundabouts | 67 | 0 | 110 | 11.69 | 783 |
- Undivided sections | 311 | 0 | 130 | 25.89 | 8052 |
- Divided sections | 53 | 0 | 152 | 10.49 | 556 |
Secondary roads | |||||
- 3-leg intersections | 165 | 0 | 33 | 1.65 | 273 |
- 4-leg intersections | 39 | 0 | 31 | 5.77 | 225 |
- Sections | 372 | 0 | 70 | 9.43 | 3507 |