Overall:
I feel like the main issue with this article is that it's missing a really interesting hook that will draw readers in and keep them invested. Right now, it's a bit too straightforward. It's also a little unclear how the entity prevents accidents. As it's described, it seems like it simply talks with people but at the same time steers the vehicle away from danger. This is just a little unclear.
As for writing humanoid SCPs, there usually needs to be a motive of some kind. It's not really explained why the entity bothers with prevent accidents all over the world. This is a great area to expand upon, and can open up more interesting narratives which can lead to an interesting hook.
Specific:
Once realising that containing it did more harm than good, containment plans were scrapped and the entity once again was allowed do its thing
I'd use this portion here to throw in at least one or two interviews with the entity so we can get a sense of why and how it does what it does. If you're looking for a motivation for the entity, just ask why would someone with precognitive abilities (and possibly the ability to teleport) spend their time saving people from roadway accidents?
Currently not sure when should I set the date of "original manifestation" (When this entity first appeared)
Dates aren't usually that important, but since you're writing a humanoid, you can take this opportunity to set it's first appearance in a decade/period that reflects it's motivation.
I am extremely tempted to write two alliterations of this SCP, one when the Foundation thought it was causing harm and one when the Foundation realized their mistake. Of course I'm not sure if this is a good idea at all
I think all the information you've laid out can be fit on one page. Just writing some addenda or referencing the fact that the Foundation was originally mistaken should be enough.
Advice:
As I mentioned earlier, having a reasonable motivation for your humanoid is key. Having a relatable goal and some level of emotion can be a huge benefit to your article, and can serve as the hook.
It's a rough idea and a bit cliché, but perhaps the entity's parents died in a car crash. Shortly after, it discovered it's powers. (Maybe it's parents or loved one's death was in some way caused by these powers) Managing to survive alone, it found a appreciation for life and decided to devote it's time to preventing similar accidents.
Alternatively, you can leave off the sad backstory and instead build your entity's motives from the decade in which it first occurred. (Maybe it's some kind of road tripping hippie metaphorically stuck in the 70s and just spreading goodwill by preventing car crashes.)
