“Together we’re advancing initiatives focused on creating safer, more efficient travel options for all modes of transportation, from vehicles to bicycles to pedestrians,” Dave Ambuehl, the chief deputy district director of Caltrans, said in a news release.
https://www.sfgate.com/travel/article/new-intersection-project-first-kind-bay-area-19901199.php
I’m not sure if there’s any safe way to have level crossings for bicycles and pedestrians across highway ramps. The safe ones are almost always underpasses or overpasses. There’s a bicycle path in Stockholm at the end of a highway ramp as it merges onto a 50 km/h road, and I’m terrified to use it.