Euphoria Hillside Park is one of the smallest stretches of road but it still makes for interesting offline traffic. And also is good for illustrating a tutorial on how you could make 2-way lines should you feel the need for it. Check this thread for step-by-step tips.
Install and use: get the track from the link above, test it and verify it's working. Using of CSP is mandatory because of track encryption. Then drop the item from my 7z into "..\content\tracks\" and confirm the prompt.
In the layout's "ai" folder you will find two variants of the traffic lines. "Restricted" for non-overtaking and "Normal". To switch between the two replace the current .ai files with the ones from the 7z and remove any "**_payloads.bin" files that CSP had generated previously.
Happy driving!