https://www.youtube.com/watch?v=FDuvDi7LYhY
The $1BN Race to Save The Golden Gate Bridge https://www.youtube.com/watch?v=QcV1btTEAVg
A Barrier_transfer_machine has made the bridge safer.
https://www.goldengate.org/bridge/bridge-operations/traffic-management/
https://mtc.ca.gov/whats-happening/news/special-features/golden-gate-bridge-moveable-median-barrier
https://en.wikipedia.org/wiki/Barrier_transfer_machine#Permanent_locations