Drawing roads using points

Hello, Im trying to convert real world roads to some 3D map i made on unity, I have the real terrain and so. I converted the roads paths to correct coordinates in unity. I first used the Line Renderer, but its very slow, plus Its a very tedious process to create every line in a game object file. I dont care for the width, all i care for is If there is a tool or method I can draw MANY lines or roads on unity, that could take the paths? (Not in game play)

There is a free tool in the Asset Store just for this. And another for rivers if you want that too.