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12 Cards in this Set
- Front
- Back
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shortest distance required for a vehicle traveling at the assumed running speed to stop safely |
stopping sight distance (ssd) |
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shortest distance required to pullout, pass and return to the correct lane without disturbing traffic |
passing sight distance (psd) |
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number of vertical meter rise per 100 meters of horizontal distance |
superelevation |
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necessary in order to counter the centrifugal force that is acting on the vehicle |
superelevation |
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two goals for transportation engineer |
provide high level of service high level of safety |
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general concern of a highway engineer |
provide a safe, stable and durable surface over which traffic may move |
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durable surfacing of the road, sidewalk or outdoor area |
pavement |
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main purpose of the pavement structure |
provide a means of reducing pressure or stress due to a wheel load to a value which the ground under can support |
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Importance of pavement design |
pavement and shoulders are the most costly items associated with highway construction and maintenance the most costly public works project undertaken by any country or state it is important that the civil or highway engineer must possess basic knowledge and understanding of pavement design principles to provide good economical structure |
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pavement design process |
provide pavements that are capable of carrying traffic loads with minimum physical deterioration, maximum safety and maximum ride comfort |
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basic functions of a pavement |
to support vehicle loads to guide the driver by giving visual perspectives of the horizontal and vertical alignment of the travel path |
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general types of pavement |
flexible rigid |
