Unfortunately, I believe petitions like these are a thing simply because jumping off a bridge is a a) a traditional and known method and b) really inconvenient for the person who does not want to think about suicide.
A bridge isn't my method of choice, but whenever I think about it, Clifton suspension bridge in Bristol, UK comes to mind.
I used to live near it and would often wander by it over or pose by the Samaritans signs (one of my favourite photos is of me looking absolutely dramatic and 'goth' in front of them with absolutely no idea what thoughts would plague me 4 years later)
The measures in place are insanely comprehensive. I believe (though this was only something an unreliable ex told me) there are guards on either side. Clifton suspension bridge also has a super fucking weird mythology- everyone from my workmate to the weird Iron Maiden fan at the back of the bar, *personally* knew somebody who had 'jumped' but the statistics never reflected this. Historically or recently.
Long story short, I feel like people demonise bridges (or revere them, depending on your angle) as these suicide spots people fall from like lemmings, but I think they're just a hallmark of our suicide associations. We can theoretically control bridges as suicide spots in a way we can't control other methods. Hell, a great post Covid job would be a suicide guard on every bridge in the world. Work shifts, get your running speed to 12 miles per hour, and you've got a job for life.
