How to drive through roundabouts.

Trains and other public transportation will reduce traffic!

Potentially significantly!

Vote for trains!

When entering a closed space other people are exiting (elevator, bus, train, etc) you can just… wait till they’re out. It’s that easy, nobody’s actually forcing you to cram the inside full to double capacity for a bit!

This is apparently new information to a significant amount of people around me

It's hard to imagine how to cram it down into a PSA but I'd like people to be more aware of the differences between a 'friend' and 'someone you have been forced to spend time with by circumstance.' As kids, so many of us have classmates we end up spending time with because they were just there and are told those are our 'friends.' Then people take that idea into the rest of our lives.
People need to be taught to have higher standards for friendship than 'the person my boss made me do an assignment with.' As hard as it can be to accept, if you don't trust a person to have your best interests in mind when making decisions which can impact your life, they are not your friend. They might be a buddy, a coworker, a neighbor, a countryman, a comrade, a pal, a cool guy, or something else, but they are not your friend. Don't let awkwardness force you into lying to say they are.

If the headlights symbol on your dashboard is blue and the lines coming from it are straight (not slanted), that means your high beams are on. Fucking turn them off

"No politics" knocks out probably my top 50 declarations. Not sure if this crosses that line, but I'd like to put something out there about the importance of community, and the benefits of getting to know your neighbours.

Just simple things like... not everyone in your street needs to buy their own lawnmower or power-drill. You can club together and buy one. Less waste, cheaper for everyone, you can take turns as and when.

Stop throwing trash on the street and/or the adjacent farmland because it ends up in the dirt thus the food. Also same with the ocean.

Mandatory day long lesson on how China is not your enemy

Racism and hate. I'd love to address drivers tailgating (#1 cause of accidents, so easily preventable), or hating cyclists (every person who uses a bike instead of a car means less road congestion, less waiting, not more).

But I think addressing racism would have a bigger impact right now - we're genetically the same, cultural differences are compatible, bad journalism and social media prods us to get angry, treating others like shit only makes others do the same, etc.

I think I'd need several sessions to get anywhere, honestly. I think I'd try to demonstrate that many people, at least where I live, don't actually know nor have ever wondered what they believe in, what their values are, what point there is to their lives besides hedonism and consumerism (might as well die if your life is that vacuous, NGL) and whether they even believe in objective truths and right and wrongs. Instead of a regular PSA, I'd make a live interview with random members of the crowd. And finally I'd tell them that all their social issues, all the issues regarding the distribution of resources, their misogyny, their love of imperialism, the reason they're not raising families, etc etc are born from this ideological vacuum (and that comes with a lack of a moral framework, ofc). And I'd tell them it's their duty to live like humans, not beasts, and not to be surprised if they end up in hell (they don't believe in it but still, and I'd comment on that and say it's part of it, because acknowledging a day of Judgment would imply personal responsibility) if they keep acting this way, they've been warned again and again.