The city of Knoxville studied this - actually by studying video of real cyclists crashing in the real world at real track crossings! - and determined: '
Crash rates are reduced dramatically at approach angles greater than 30°, and practically non-existent at angles greater than 60°.'
https://www.transportation.gov/sites/dot.gov/files/docs/utc/328571/utcnewsletterquarterly1jan2019.pdf
They laid down some more pavement to make the crossings safer.
