Research Article
Driver Behavior on Combination of Vertical and Horizontal Curves of Mountainous Freeways
Table 1
Road parameters of each observation cross-section in k1139+530~k1139+920 interval and k1143+520~k1143+940 interval.
| | Number | Stake mark | Road parameters | | Radius of horizontal curve (m) | Longitudinal grade (%) |
| | S1a | k1139+530 | Straight line | 1.18 | | S1b |
| | S2a | k1139+630 | 225 | 1.95 | | S2b |
| | S3a | k1139+720 | 225 | 1.95 | | S3b |
| | S4a | k1139+820 | 225 | 1.95 | | S4b |
| | S5a | k1139+920 | 440 | 1.95 | | S5b |
| | S6a | k1143+520 | 260 | 2.213 | | S6b |
| | S7a | k1143+620 | 170 | 2.213 | | S7b |
| | S8a | k1143+730 | 170 | 2.213 | | S8b |
| | S9a | k1143+840 | 170 | 2.213 | | S9b |
| | S10a | k1143+940 | Straight line | 2.213 | | S10b |
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