View examples of the XML formats you can use for various cant attainment methods.
This section explains the formulas used in some common cant attainment methods.
By Spiral Lengths, and % On Tangents if No Spiral
The following example shows the XML format you can use to calculate transition stations based on spiral lengths. If a curve group does not contain spirals, then a specified percentage of the transition takes place on the tangents.
<CantAttainmentMethod name="by spiral lengths; and % on tangents if no spiral">
<TransitionFormula type="LRtoFC" formula="IF({l}, {l}, {t})"/>
<TransitionFormula type="LRtoBC" formula ="IF({l}, {p}*{l}, {p}*{t})"/>
</CantAttainmentMethod>
By Lengths from a Table, and Maximum Cant on Tangents if No Spiral
The following example shows the XML format you can use to calculate transition stations using transition lengths from a table. If a curve group does not contain spirals, then a specified maximum cant value is applied on the tangents.
<CantAttainmentMethod name="by lengths from table; and max cant on tangents if no spiral">
<TransitionFormula type="LRtoFC" formula="{t}"/>
<TransitionFormula type="LRtoBC" formula ="IF({l}, {p}*{t}, IF({a}&{d}<={a}, {d}*{t}/{a}, {t}))"/>
</CantAttainmentMethod>