Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Road & Traffic System Free.
Road & Traffic System v2.1.2
First off, R&T works with Unity 5. We just like to keep our Unity 4 customers happy also ?
Road & Traffic System is a plugin designed for Unity to allow users to quickly create and simulate small or large dynamic traffic networks for any kind of vehicles via placement of different road pieces and traffic lights.
The system is very customizable with an integrated Unity Editor toolkit. Users have the ability to customize their own road pieces and extend on the base road pieces and traffic lights available to them in the Road & Traffic System. Built to run fast on mobile too! New Pedestrian System included!
Vist the website.
Vist the forum.
Check out all tutorial videos.
Check out our newest package “City Generator”. It works great with the Road & Traffic System package to dynamically generate a city throughout your road network! Visit the City Generator website to find out more.