Yeah, the IRA and Infrastructure Bill steer about $67 billion to railways, $80 billion to transit systems. And even though a lot of the other spending goes towards the status quo of car-based passenger transportation, electrifying that will go a long way towards reducing carbon emissions.
And there are some more ambitious ideas baked in, too: redesigning cities to require less car infrastructure and overall energy use, etc.
I thought it was a big deal when passed and honestly can't understand why people who care about climate don't acknowledge just how big of a deal it was (and how devastating that so much of the money authorized will now be in control of a Trump administration).
The US peaked at 23.1 tonnes of carbon emissions per capita in 1973. It came off that peak but stayed pretty flat through 2007 or so, at 20.2 tonnes per person. Since then, it's steadily come down, and is now at about 14.9.
There's still a long way to go, but the 35% reduction that the US has already accomplished shows that it's possible to keep making progress.