Horizontal Allignment
Horizontal Alignment
(i) Minimum Radius
The following formula is used in determining the required. minimum
radius for the curves.
R = V2 / 127(e+f)
Where R = Minimum radius of curve in meters V = Design
speed, in km/hr
e = Maximum rate of superelevation
J- = Maximum allowable side friction factor.
Table 5-11 gives the minimum radius that are to be used in design. Flattercurves
should always be used wherever possible. There is no necessity to
provide any transition (spiral) curves.
(i) Minimum Radius
The following formula is used in determining the required. minimum
radius for the curves.
R = V2 / 127(e+f)
Where R = Minimum radius of curve in meters V = Design
speed, in km/hr
e = Maximum rate of superelevation
J- = Maximum allowable side friction factor.
Table 5-11 gives the minimum radius that are to be used in design. Flattercurves
should always be used wherever possible. There is no necessity to
provide any transition (spiral) curves.
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