Validation of and enhancements to an operating-speed-based geometric design consistency evaluation model /
0.85 M/S2 is reasonable for the purposes of this model.
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | 0.85 M/S2 is reasonable for the purposes of this model. 85th percentile speed on tangents is not statistically 85th percentile speeds revealed that the current speed- acceleration and deceleration behavior of drivers approaching acceleration and deceleration on curves and their tangents acceleration and deceleration rates indicate that the acceleration and deceleration rates revealed that adjustments alignment, especially in and near curves. Tests of mean and analysis procedures used to analyze operating speeds, and departing horizontal curves. Detailed data collection are presented. Hypothesis tests of mean observed and assumption of equal acceleration and deceleration rates at consistency evaluation procedure: (1) the speed reduction different from the assumed desired speed on tangents (97.9 different from the estimated mean reduction in operating estimated speed reductions resulted in the conclusion that, estimation ability of the model, and (2) assumptions about for curves with no downstream intersections, the mean Further research is needed to confirm this conclusion. The Hypothesis tests of mean observed 85th percentile speeds on in acceleration and deceleration take place throughout an km/h) at a 0.05 significance level. Inspection of implied observed reduction in operating speed is not statistically profile model fits the observed data reasonably well. related to an operating-speed-based geometric design results of this thesis support the continued use of the model speed at a 0.05 significance level. Analysis of observed tangents resulted in the conclusion that the mean observed This thesis documents efforts to validate two elements until further research is conducted to enhance the model |
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| Item Description: | "Major subject: Civil Engineering". Vita. |
| Physical Description: | viii, 63 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |