One-way roads are really useful for managing traffic flow, especially around busy intersections and commercial areas. The low purchase and monthly cost makes them a practical option even for smaller cities. I also like that they support bridges and tunnels, although the lack of diagonal roads is a limitation.
One-way roads are a useful addition for controlling traffic flow and reducing congestion. The bridge and tunnel support also make them more flexible for city planning. It would be interesting to see more road options added in future updates.