The adjustment factor is used to adjust for different roadway widths in order to provide good manoeuvring facilities to user.
To edit, go to Options > Parameters > Design > Superelevation > edit ‘Adjustment Factor of No. of lanes’
![](https://i0.wp.com/mes100.wpengine.com/wp-content/uploads/2019/01/image3.png?resize=935%2C618)
![](https://i0.wp.com/mes100.wpengine.com/wp-content/uploads/2019/01/image2.png?resize=557%2C431)
Example:
![](https://i0.wp.com/mes100.wpengine.com/wp-content/uploads/2019/01/image1.png?resize=1080%2C651)
As shown in image 3, the spiral is not the same due to the ‘Adjustment factor’.
Total number of lanes = 4
Spiral length = 28.5 m x 1.5 (from adjustment factor table for total number of lanes = 4) = 42.75m