In a BFS$,$ fLc$=0\mathrm{.}0$ when:

$$ A$.$ Right shoulder width equal or greater than $6$ ft$.$

$$ B$.($Left shoulder width $+$ right shoulder width$)$ equal or greater than $12$ ft$.$

$$ C$.$ Lane width equal or greater than $12$ ft

$$ D$.$ The number of lanes must be greater than $5.$