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NEW AND IMPROVED UNSYMMETRICAL VERTICAL CURVE FOR HIGHWAYS.
| 题名： | NEW AND IMPROVED UNSYMMETRICAL VERTICAL CURVE FOR HIGHWAYS. |
| 作者： | Easa-SM |
| 关键词： | UNSYMMETRICAL-VERTICAL-CURVES; VERTICAL-ALIGNMENT; RIDING-QUALITY; AESTHETICS-; SIGHT-DISTANCES; COMFORT-; VERTICAL-CLEARANCE; HIGHWAY-DESIGN |
| 摘要： | A new unsymmetrical vertical curve for highways that provides important desirable features is developed. The curve has unequal horizontal projections of the tangents, but its component parabolic arcs are equal. The new curve minimizes the difference between the rates of change of grades of the two arcs and consequently provides a smoother ride and is more aesthetically pleasing. The curve also improves the sight distance, reduces the length requirements, increases rider comfort, and increases the vertical clearance compared with the traditional unsymmetrical vertical curve. These desirable features should make the new unsymmetrical vertical curve an important element in vertical alignment design. |
| 总页数： | Transportation Research Record. 1994. (1445) pp94-100 (7 Fig., 2 Tab., 10 Ref.) |
| 报告类型： | 科技报告 |
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