Road maker?

Are there any free SketchUp Make plugins to create objects such as a two lane highway that would do that job?

There are different ways to create roads, you can do it even with native tools creating a profile a path and use the follow me tool. With a plugin like profile builder you can create an assembly with components like trees and street lamps and it will create automatically the road with all the elements, it all depends on where and how you want the road to be created.

I know free is always preferred, but sometimes paid extensions are worth their weight in gold!
If it saves you an hour or two, and frustration, and enhances your project, I think it’s worth a try.

It is worth taking a look at Vali Instant Roads.