Unfortunately this is caused by a known limitation when using the Generator > Limit to ID
feature on curved splines. Internally each spline section is considered separate so it cannot compute the curves required to create a continuous deformation where the two IDs adjoin. The simplest solution therefore is to add a couple of extra vertices either side of the curved section so that the change starts on a straight section of the pavement. I've attached your file with that change applied.
If this isn't possible there is a workaround that uses Conditional nodes instead of the Limit by ID feature. You can read more about this and download a sample file in this post
I hope that helps.