From their announcement:
We had a number of requests to provide our Paved Felt Highway system with ALL white lines to better simulate the roadways in Europe. The roadways are right hand drive (noted with the intersections). To order, just purchase the standard set (with Yellow/White lines) and then send us an email requesting the ALL white lined roadways. We will be updating the website’s HTML coding to allow direct purchases after Christmas, or you can simply request that we send you PayPal invoice.
These roadways are perfect for 20-25mm scale Sci-Fi near future road rage games, or post WWII/modern warfare games.