Symmetrical split Turnout
In this layout the straight track is diverted into two opposite direction using the same radius for both the track of the turnouts. Since the direction is divided equally on both side, the crossing centre line coincides with the centre line of the straight track.
This is contrary flexure layout in which the degree of the turnout curve will become half and the radius doubled. Lead of the turnout will remain the same. Further details can be worked out applying the principle of ordinary turnout.
This type of layout is used at way side station on end of loop line to provide sand humps also known as snag dead end. Even by using 1 in 8½ layouts, one gets the radius of 1 in 12 turnouts, which is the minimum prescribed for the movement of passenger trains. The sand hump also diverts away the runway vehicles there by improving the safety on the main line.
|Symmetrical split Turnout