In the example I used in the question, the bridge will be closed for a very long time. I used this as I knew that the road closed symbol would be there for some time, so anyone that might be able to answer the question would see what I'm talking about.
But in the real world, roads get closed on a daily basis, then reopened (accidents, construction, etc). Apple Maps appears to show the road closed symbol automatically, yet when I use the code above, it doesn't show the symbol, just the live reporting that changes the color to that dark red. I'd like my project to show these road closed symbols as well... if I could figure out what they are called.