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Curve Lead is the distance between the theoretical nose of crossing and the tangent point measured along the length of main track. Check FAQs
CL=SL+L
CL - Curve Lead?SL - Switch Lead?L - Crossing Lead?

Curve Lead Example

With values
With units
Only example

Here is how the Curve Lead equation looks like with Values.

Here is how the Curve Lead equation looks like with Units.

Here is how the Curve Lead equation looks like.

30Edit=8Edit+22Edit
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HomeIcon Home » Category Engineering » Category Civil » Category Transportation Engineering » fx Curve Lead

Curve Lead Solution

Follow our step by step solution on how to calculate Curve Lead?

FIRST Step Consider the formula
CL=SL+L
Next Step Substitute values of Variables
∴ CL=8m+22m
Next Step Prepare to Evaluate
∴ CL=8+22
LAST Step Evaluate
∴CL=30m

Curve Lead Formula Elements

Variables
Curve Lead
Curve Lead is the distance between the theoretical nose of crossing and the tangent point measured along the length of main track.
Symbol: CL
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Formulas to find Curve LeadOpen Variable
Switch Lead
Switch Lead is the distance between the tangent point and the heel of switch measured along the length of the main track.
Symbol: SL
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Formulas to find Switch LeadOpen Variable
Crossing Lead
Crossing Lead is the distance between theoretical nose of crossing and the heel of switch measured along the length of the main track.
Symbol: L
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Formulas to find Crossing LeadOpen Variable

Other Formulas to find Curve Lead

​Go Curve Lead (C.L )
CL=2⋅R0⋅G
​Go Curve Lead (C.L ) if given N
CL=2⋅G⋅N

Other formulas in Points and Crossings category

​Go Switch Angle
α=asin(dLt)
​Go Theoretical Length of Tongue Rail
Lt=dsin(α)
​Go Number of Crossing (N)
N=SLc
​Go Right Angle or Cole's Method
N=cot(αCrossing)

How to Evaluate Curve Lead?

Curve Lead evaluator uses Curve Lead = Switch Lead+Crossing Lead to evaluate the Curve Lead, The Curve lead formula is used to calculate curve lead which is basically distance between the theoretical nose of crossing and the tangent point measured along the length of main track. Curve Lead is denoted by CL symbol.

How to evaluate Curve Lead using this online evaluator? To use this online evaluator for Curve Lead, enter Switch Lead (SL) & Crossing Lead (L) and hit the calculate button.

FAQs on Curve Lead

What is the formula to find Curve Lead?
The formula of Curve Lead is expressed as Curve Lead = Switch Lead+Crossing Lead. Here is an example- 30 = 8+22.
How to calculate Curve Lead?
With Switch Lead (SL) & Crossing Lead (L) we can find Curve Lead using the formula - Curve Lead = Switch Lead+Crossing Lead.
What are the other ways to Calculate Curve Lead?
Here are the different ways to Calculate Curve Lead-
  • Curve Lead=sqrt(2*Radius of Outer Curve of Turnout*Gauge Length)OpenImg
  • Curve Lead=2*Gauge Length*Number of CrossingOpenImg
Can the Curve Lead be negative?
No, the Curve Lead, measured in Length cannot be negative.
Which unit is used to measure Curve Lead?
Curve Lead is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Curve Lead can be measured.
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