DEVELOPMENT OF OPERATING SPEED MODELS FOR DIFFERENT VEHICLE CLASSES ON RURAL TWO-LANE HIGHWAYS | ||||
| ERJ. Engineering Research Journal | ||||
| Article 13, Volume 31, Issue 4, October 2008, Page 413-418 PDF (334.65 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erjm.2008.69832 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Ibrahim Hassan Hashim | ||||
| Department of Civil Engineering, Faculty of Engineering, Minoufiya University, Shebin El-Kom, Egypt | ||||
| Abstract | ||||
| The aim of this study was to develop operating speed models for different vehicle classes for rural two-lane highways. Ten horizontal curves, connected with relatively long tangents, with various geometric characteristics, were selected to perfom this study. A series of traffic surveys were carried out using automatic traffic counters, to collect sufficient speed data for different vehicle classes. Preliminary analysis confimed the necessity of the classification of the vehicles in order to develop operating speed models. Further analysis looked at the differences between speeds on inside and outside lanes of curves and significant differences were found between the speeds of the two directions. Several operating speed models were developed for tangents and curves for different vehicle classes. These models are very useful and can be used for design consistency evaluations. | ||||
| Keywords | ||||
| Vehicle Classes; Operating; Speed; Design Consistency; ANOVA; Regression Analysis | ||||
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