ideas for pedestrian detection on blind driveways

I doubt there is an easy way other then the tenants going slow and watching. I have never had a problem with pedestrians but when exiting unit blocks with parallel parking on the street you have to try and look down the street to see if any cars are coming then slowly going on the street. This can be stuffed up with a van parked down the street.

Sensors for flashing lights? May help, but it is the driver's accountability, so they shouldn't rely on anything except their eyes. Those convex mirrors do help, but I find judging the distance of others a bit hit and miss, but a longer wait is better safe than sorry. I guess the mirrors also help the pedestrian if they wish to be watchful (and not in their smartphone)

Does the fence need to be 'that' high? Maybe lower it a couple of metres either side of the driveway

The mirrors work for drivers I have found, and can be a visual warning for the pedestrians if they notice them.

Only other thing I can think of is remove the block wall
Or, can you remove a block here and there so it isn't solid - say at the driver's vision level?

As a driver, cyclist and pedestrian, when I see one of those mirrors it warns me that there could be something around that blind corner and I am extra careful. They are ugly but a good visual warning - to those who are observant and take note.

Any sort of traffic stopper to catch the drivers eye and make them proceed slowly will work.

I have already put up a pic of a delightful traffic stopper but the mods removed her.