Evaluation of 3d Coordination to Maximize Available Stopping Sight Distance in Two-Lane Rural Highways
Sight distance is one of the most important factors of road safety since it allows the driver perceiving, at real time, road characteristics and its surroundings. A misperception of this crucial information could induce a decision to drive with a manoeuvre with less margin of safety. A finite elemen...
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| Format: | Article |
| Language: | English |
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Riga Technical University Press
2014-06-01
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| Series: | The Baltic Journal of Road and Bridge Engineering |
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| Online Access: | https://bjrbe-journals.rtu.lv/article/view/3490 |
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| author | Ana Tsui Moreno Vicente Ferrer Alfredo Garcia |
| author_facet | Ana Tsui Moreno Vicente Ferrer Alfredo Garcia |
| author_sort | Ana Tsui Moreno |
| collection | DOAJ |
| description | Sight distance is one of the most important factors of road safety since it allows the driver perceiving, at real time, road characteristics and its surroundings. A misperception of this crucial information could induce a decision to drive with a manoeuvre with less margin of safety. A finite element based software application was developed in Matlab to calculate the sight distance profile at vertical crest curves overlapped with horizontal curves. It was observed that the layout visibility gets principally lost where the superelevation changes its sign; thus, the vertical curve midpoint does not present the highest available sight distance, contrary to the bidimensional analysis. Later, available stopping sight distance was maximized considering different geometric parameters combinations. Stopping sight distance depended mainly on the ratio between the vertical crest curve parameter and horizontal radius, rather than the vertical crest curve parameter. Moreover, values of vertical crest curve parameter lower than the minimal values established in the Spanish design guidelines satisfied the required stopping distance. The offset between horizontal and vertical vertices slightly affects the results; however, the effect of the approach grade is important even if algebraic difference of vertical grades is kept fixed. |
| format | Article |
| id | doaj-art-0213a697a73f41c0ba4b1a162e60cc56 |
| institution | Kabale University |
| issn | 1822-427X 1822-4288 |
| language | English |
| publishDate | 2014-06-01 |
| publisher | Riga Technical University Press |
| record_format | Article |
| series | The Baltic Journal of Road and Bridge Engineering |
| spelling | doaj-art-0213a697a73f41c0ba4b1a162e60cc562025-01-02T08:03:38ZengRiga Technical University PressThe Baltic Journal of Road and Bridge Engineering1822-427X1822-42882014-06-01929410010.3846/bjrbe.2014.121925Evaluation of 3d Coordination to Maximize Available Stopping Sight Distance in Two-Lane Rural HighwaysAna Tsui Moreno0Vicente Ferrer1Alfredo Garcia2Highway Engineering Research Group, Universitat Politècnica de València, Camino de Vera, s/n, 46022 Valencia, SpainHighway Engineering Research Group, Universitat Politècnica de València, Camino de Vera, s/n, 46022 Valencia, SpainHighway Engineering Research Group, Universitat Politècnica de València, Camino de Vera, s/n, 46022 Valencia, SpainSight distance is one of the most important factors of road safety since it allows the driver perceiving, at real time, road characteristics and its surroundings. A misperception of this crucial information could induce a decision to drive with a manoeuvre with less margin of safety. A finite element based software application was developed in Matlab to calculate the sight distance profile at vertical crest curves overlapped with horizontal curves. It was observed that the layout visibility gets principally lost where the superelevation changes its sign; thus, the vertical curve midpoint does not present the highest available sight distance, contrary to the bidimensional analysis. Later, available stopping sight distance was maximized considering different geometric parameters combinations. Stopping sight distance depended mainly on the ratio between the vertical crest curve parameter and horizontal radius, rather than the vertical crest curve parameter. Moreover, values of vertical crest curve parameter lower than the minimal values established in the Spanish design guidelines satisfied the required stopping distance. The offset between horizontal and vertical vertices slightly affects the results; however, the effect of the approach grade is important even if algebraic difference of vertical grades is kept fixed.https://bjrbe-journals.rtu.lv/article/view/3490alignmentalignment coordination3d sight distancestopping sight distanceavailable stopping sight distancecross section design |
| spellingShingle | Ana Tsui Moreno Vicente Ferrer Alfredo Garcia Evaluation of 3d Coordination to Maximize Available Stopping Sight Distance in Two-Lane Rural Highways The Baltic Journal of Road and Bridge Engineering alignment alignment coordination 3d sight distance stopping sight distance available stopping sight distance cross section design |
| title | Evaluation of 3d Coordination to Maximize Available Stopping Sight Distance in Two-Lane Rural Highways |
| title_full | Evaluation of 3d Coordination to Maximize Available Stopping Sight Distance in Two-Lane Rural Highways |
| title_fullStr | Evaluation of 3d Coordination to Maximize Available Stopping Sight Distance in Two-Lane Rural Highways |
| title_full_unstemmed | Evaluation of 3d Coordination to Maximize Available Stopping Sight Distance in Two-Lane Rural Highways |
| title_short | Evaluation of 3d Coordination to Maximize Available Stopping Sight Distance in Two-Lane Rural Highways |
| title_sort | evaluation of 3d coordination to maximize available stopping sight distance in two lane rural highways |
| topic | alignment alignment coordination 3d sight distance stopping sight distance available stopping sight distance cross section design |
| url | https://bjrbe-journals.rtu.lv/article/view/3490 |
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