Research Article
Safety-Based Optimization Model for Highway Horizontal Alignment Design
Table 4
Optimization results of the objective function.
| Items | Variables | Optimization results |
| Design variables after optimization | Transition length ahead () | 57.96 | Circular curve length () | 62.13 | Transition length back () | 57.96 | Tangent deflection angle (θ) | 0.8367 | Radius of curve (R) | 218.1 | Coordinate of start point () | (4.6334, 4.6334) | Superelevation (E) | 0.032 |
| Objective function after optimization | Economic () | 178.05 | Safety () | 1.91 |
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