Can we get more details please? How is it even possible for cars to collide head on on that single-lane off-ramp onto a divided road?

Read this:
Web Link

Even the URL tells the story.

Here's a link without a paywall. Merc paywall is a disgrace. Web Link The last time a driver was killed by a wrong-way driver on 280, was in the middle of the afternoon. A couple of months ago. Not long before I had passed that same area. Even in broad daylight, I have seen some scary driving on 280. I think it might be partly due to the fact that you can actually get up to the speed limit -- unlike the other highways with have FasTrak now, which makes everyone who can't afford it, to slow down to a crawl. I suggest putting Fas Trak on all of 280, to achieve the same effect. People just do not know how to drive above 35 MPH anymore, and when they are met by a wrong-way driver, there is no time to avoid what they couldn't anticipate -- someone driving the wrong way, right into their car that's going 65 MPH. Web Link <--- this site tells about what happens in high speed crashes. I was in a wrong-way driver collision 30 years ago. It was a downtown street, at noon. Driver had turned right, going the wrong way on a one-way street. I was maybe going 30 MPH. 30 MPH getting struck by someone coming straight at me going the same speed, the air bag deployed but I broke it with my face. I was lucky not to be killed. The driver had no license, did not speak english, and had no insurance. There was nothing I could have done to avoid getting hit. The airbag deployment was like getting shot in the face by a powder can. Luckily, I did not die. I wish these two victims could have only suffered minor injuries. RIP.

Thank you @MyFeelz for sharing your important story. I hope others read it and learn from it.