I actually get off a narrow sealed road, in good time, approaching either a blind corner, a blind crest, or a vehicle coming towards me when another vehicle is about to overtake me.
This way I am completely safe and not relying on the driver to actually see me in good time and slow down before hitting me. I do not put my life in the hands of others. I control my own destiny. What if that driver was on drugs, was talking to a passenger, was very tired, day dreaming while driving, . . . . !!
I have a good sized flat mirror. (Hard to come by since most mirrors for bikes are quite small and are convex to make up for their size. ) I check the mirror as I approach the hazard (as defined above.) I decide in good time, by 'putting myself in the drivers seat' of the car coming from behind, when I have passed the 'critical point'. That being the point that if I was still on the bitumen then the driver would not be able to easily overtake and be back on the correct side of the road well before the start of the hazard concerned.
And too many people, both riders and drivers, have a false idea that provided they get back to the correct side just before the start of the hazard then they have been safe. Of course they have overlooked the fact that they need to be able to get back by about 150m BEFORE the hazard, maybe more at higher speeds, because somewhere along their overtake another car could suddenly come out of the hazard traveling towards them at high speed. And their reaction would be to save themselves and wipe out the cyclist at the same time!
I also use wider tyres than the regular racing slicks that so many recreational road cyclists use. I use 28mm tyres. Even when pumped up to around 100 psi they allow me to ride off the bitumen and onto the gravel verge reasonably safely. But I do make sure I wipe off speed on the bitumen first. And I must admit there is a certain amount of practice needed!
Otherwise you can skid and fall in this maneuver!