How to stop people driving over property line?

I’m wanting to come up with a solution to people turning around on my property. It’s a narrow terraced street with a dead end. There are no signs to say it’s a no through road when entering the street.

I have a H bar over the drive and live close to the front of the street so the ideal place to turn around. But people don’t do it gently. They swing in at 20mph with no regard. The neighbour across the road has had his garage hit because of it.

I have installed a bollard (picture 2) over the footpath to protect the corner of the house, as people were getting within an inch of the corner. Where as now they just drive down the drive instead. One slip of the foot and they will be in my living room.

I don’t mind people turning around outside my house. But there isn’t any need to go over the drive or get so close to the house.

I can’t install something too chunky like a gate as the drive is only 2.4 metres wide and I can’t install a retractable bollard as there’s a main sewer line running under the drive.

Thoughts?

Thank you