What I really like is the lane modification system on the Golden Gate Bridge connecting San Francisco to Marin in California. The bridge is usually 3 lanes each

What I really like is the lane modification system on the Golden Gate Bridge connecting San Francisco to Marin in California. The bridge is usually 3 lanes each way during normal hours. But during peak hours one is added to the direction of peak traffic flow by moving the lane divider. The bridge then becomes 2-4 with 4 lanes for the peak traffic direction. I think this is doable for other highways as well - at least for the sections where a major artery merges. California drivers are pretty damn terrible when it comes to merging and forcing them to accelerate to highway speed by giving them a lane of their own at these merges with lane switch allowed in only direction will save everyone a lot of time. https://en.wikipedia.org/wiki/Golden_Gate_Bridge#Traffic https://en.wikipedia.org/wiki/Golden_Gate_Bridge#Traffic