RADIUSES VS RADII

During the review of a document related to road construction, I have noted that the term ‘radiuses’ was used instead of the correct plural form ‘radii’. In such and important documentation, accurate technical terminology is essential to prevent misinterpretation. Am not saying "radiuses" is wrong but it is also less common in casual or general English, especially outside technical contexts.

Here’s an example:

“The highway design includes three horizontal curves with radii of 500 m, 750 m, and 1,000 m to ensure safe vehicle turning speeds.”

Here, radii refers to the different curvature measurements of each road bend.