Tutorial: https://youtu.be/YJsbqyFOF78

Options available for V 1.0:
One or two lanes
Show or hide ground reference
Turn on/off car lights
Define amount of vehicles (attention with this set. Depending on the spline length, a number bigger than 20 can cause cars intersections)
Randomness of cars

How to use:
Append the collection Easy_Traffic_Generator to your scene and use NurbPath spline inside the collection to draw the path.

Observation: This tool is for the creation of cars Traffic only. To create roads and sidewalk also super easy get Easy Road Generator here at Blender Market.