Predicting Speed Model of Horizontal Curves on Exclusive Motorcycle Lane.
The prediction and estimation of operating speeds on highways are of great significance to planners and designers. A variety of physical factors may influence speeds on highways. Horizontal curvature has the greatest impact on speed. The objective of this study was to develop speed prediction equ...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English English |
| Published: |
2011
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/23289/1/Predicting%20Speed%20Model%20of%20Horizontal%20Curves%20on%20Exclusive%20Motorcycle%20Lane.pdf http://psasir.upm.edu.my/id/eprint/23289/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Universiti Putra Malaysia |
| Language: | English English |
| Summary: | The prediction and estimation of operating speeds on highways are of great significance
to planners and designers. A variety of physical factors may influence speeds on highways. Horizontal
curvature has the greatest impact on speed. The objective of this study was to develop speed
prediction equation on horizontal curve using the geometric characteristics of the curve at 11 sites in
exclusive motorcycle lane. To achieve this objective, the speed of motorcyclist was measured in
exclusive motorcycle lanes in Malaysia. The multiple linear regression analysis was conducted to
evaluate the effect of horizontal curve variables on the speed reduction, expressed as 85th percentile
speed reduction, as a dependent variable. The main independent variables entry in the regression
analyses were radius of the curve (R), length of tangent (T) and deflection angle (Δ). Also the effect
of curve radius on the predicted 85th percentile curve speed was investigated. The findings from the
efforts were guidelines in design for different curve types. These guidelines will help both designer
and decision makers in evaluating different alignment alternatives. |
|---|