How to make a polyline of arbitrary width on Google Maps?

Question

JavaScript

When building a route on Google Maps, we get a line going from point A to point B.
Task: to make this line as wide as 5 km, for example. The google.maps.Polyline
object has the ability to change the google.maps.PolylineOptions property strokeWeight , which is responsible for the width of the drawn line in pixels. But the problem is that this parameter has a limitation and it is impossible to make, for example, a line width of 100px. Here is an example of what I would like to get: How to implement it?