Click or press space. Had the random idea to do this with the Vehicle AI in Rigs of Rods, by spawning so many of the same bus with it after recording my path (not a video, like the actual path) and then getting other Photon 3800s with a T444E engine (different numbering) to follow it. lol Yes I was lagging pretty bad since I had 30+ buses spawned. ☠️ Also, even though I set the speed limit to 72, they still seemed to go 43-49 for some reason. And normally, I'd set the time to night time, but this map has very little to no lighting even with headlights on, so I needed to be able to see, not to mention nighttime makes it lag more.
If you're wondering why I chose 375 out of all the others, it's because the number reminds me of this one bus I recorded irl with a similar number (except the first number wasn't a 3, but both numbers ended with 75), that was a 2004 IC CE200 which unfortunately retired. Both have the same engine (a T444E). I'm usually driving 375 when driving the Photons (as for the 1st Gens though, it's 431). lol