Table 1. Study site information.
| Location | Const. year | distance (km) | Road width (m) | No. of curve | Radius of curve (m) | Longitudinal gradient (%) | Distance of straight (m) |
| Chuncheon-si | Bugwi-ri | 1994 | 2.3 | 3.1 | 28 | 17.6 | 4.3 | 62.5 |
| 2.9∼3.6 | 11.5∼32.5 | 0∼12 | 25.0∼222.0 |
| Ohang-ri | 2018∼2019 | 3.5 | 3.4 | 29 | 24.8 | 5.9 | 83.5 |
| 3.0∼5.0 | 12.5∼45.1 | 1∼12 | 21.0∼480.1 |
| Hongcheon-gun | Pungcheon-ri | 1995 | 2.6 | 3.0 | 27 | 19.5 | 4.3 | 95.3 |
| 2.8∼3.5 | 11.1∼34.5 | 0∼8 | 21.4∼349.0 |
| Seongsan-ri | 2015 | 2.9 | 3.4 | 29 | 24.9 | 7.3 | 89.6 |
| 3.0∼5.0 | 12.7∼44.1 | 2∼13 | 20.5∼256.2 |
| Total | 11.3 | 3.4 | 113 | 21.6 | 5.4 | 82.0 |