After the rain

The workmen came and built a retaining wall today. I have to say it does look very substantial - even if made of wood. Which is good as it needs to hold up our driveway. 
I'm not sure what my neighbour hopes to gain from this, perhaps 1/2 metre added to a driveway that already has room for 4 cars. A couple of years ago he drew up papers he wanted us to sign regarding who / or not we, or our children would sell our property to.  We didn't sign any papers.  
I always park my car on the driveway nearest to his side. I'll need to take care as our driveway is now a bit narrower and I have a big car.