Geometry > Bypass Entry > Total Flare Lt

Total Flare Lt

The Total Flare Length of the combined Roundabout Entry and Bypass is Lt.

The Total Flare Length Lt for Yield or Exclusive Bypasses

Lt is the flare length of the total approach.

Et = E+Eb Vt is the total approach width at the start of the approach flare.

Lt is measured from E to the width (Et+Vt)/2. This width is road width and excludes gutter pans gore hatching or vane islands.

The entry width of the bypass Eb is the minimum width of the bypass lane. The lane should have a uniform width but it is often necessary to widen the single lane through the bend to accommodate trucks, so the minimum width should be at the end of the bypass lane. However, it is possible that the minimum is at the start of the bypass lane.

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