The road is pretty steep on either side of the bridge and it's a small one lane (IIRC) bridge. At night I definitely think it could be difficult to see that the bridge was out until it was too late.

Edit: According to articles linked elsewhere in the comments the bridge was privately owned and the owners are being sued along with Google.

As far as ownership, I am no expert but I think the land under the road would be government owned (not sure if state, county, or city) because there's a public right-of-way to ensure houses in the subdivision have access to public roads. However in the absence of a HOA the property owners within the subdivision are collectively responsible for road maintenance. It's part of the paperwork when you buy a house. But I don't know if they're required to maintain it to a specific standard... And in this particular case the neighborhood in question is pretty middle class (middle class in a LCOL area). I'm guessing a bridge repair isn't cheap, so it's very plausible that the neighborhood literally couldn't afford it. This definitely seems like a thorny topic, not something where it's easy to lay the blame at the feet one individual or entity.