I would add, there's a lot of wisdom applicable here from the Vision Zero road safety philosophy..... namely, that motorists draw a lot of inferences from road configuration, and this determines how they drive.
In the case of Eureka, the crossing has been heavily camouflaged in the interest of making it look like an insignificant branch line crossing that has only a few tiny slow trains that stop easily and don't interfere with the tony and leafy residential surroundings. Which is very much at odds with the reality - ie it's a heavily trafficed mainline crossing that may soon see 15 minute 2WAD headways run by full size heavy trains that are running at full permissible track speed (albeit thru a restrictive curve).
If I were the regulator, I would be cutting back bushes and doing other thing that might look stark and nasty but would make the crossing more intimidating to motorists.
And if I were a GO engineer, I would be leaning on the horn for every moving object and squirrel I encounter, whistle ban or not.
- Paûl