> It is indeed known to have issues at railway crossings:

At scale you can “have issues” and still work 99% of the time. If it’s completely incapable of handling railroad crossings that’s relatively easy to verify.

> AFAIK, there's no issue with bridges that cross roads, however. It will just ignore a road that's above or below the one you're travelling on that doesn't intersect with yours. Just like a human driver would do.

As a user of the system that’s worked it all out it’s not an issue for you, but getting that behavior from raw sensor data is non trivial.