If I couldn't cross at a 90 degree angle, I'd walk it. As mentioned, you can break your hip like that - in fact, I know there's a member on BF who did break his hip like that (don't think I saw him post). It's one of those things that you could be fine 999 times out of 1000, but that one can do serious damage.

As mentioned, it's not the roughness of the crossing, it's the ability of the small area between the rail and the wood to grab your tire and pull you down before you can get your leg down, which leads to hip damage. Broken hips are not something to be messed with - the bone often doesn't heal well and can go necrotic.

No shame in a bit of extra caution.