Extra width required on curves is given by
1
\({W_e}= \frac{{13\times{{(B + L)}^2}}}{R}\)
2
\({W_e} = \frac{{23\times{{(B + L)}^2}}}{R}\)
3
\({W_e} = \frac{{13\times{{(B + L)}^3}}}{R}\)
4
\({W_e} = \frac{{33\times{{(B + L)}^3}}}{R}\)
5
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