Geometry > Bypass Entry > Bypass Effective Flare Length

Bypass Effective Flare Length

Free and Merge bypasses have a flare length Lb = 0.

Below Yield Bypass flare length Lb is defined together with L' the Entry Flare Length.

The widths V and Vb are found first.

If V = E, L' = 0.

If Vb = Eb, Lb = 0.

The positions of V and Vb are on the parallel section of the approach where the taper starts V to E and Vb to Eb.

In the example above V and Vb are coincident this is not always the case.

Below are examples for measuring L' and Lb for both types of Exclusive right turn lane.

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