Well it turns out that the place where two roads cross is a "crossroads" but as you approach the crossroads you will see a "crossroad" ahead of you. It is the road that crosses the one that you are on.
If I say, "Let's meet at the crossroads", I mean at the place where the roads cross. But if I say "Let's meet at the crossroad" I mean actually on the road that crosses the other road which is possibly more familiar to both of us.
I don't suppose anybody else has ever fretted about such a thing but I am afraid that that is how my brain is wired. Words have always mattered to me.
Earlier today, I took my camera out to gather pictures of a typical suburban crossroads here in Sheffield. I thought that visitors from other lands might be interested. It's nowhere special. We call it "Millhouses traffic lights" or "the crossroads at Millhouses" It's where Abbeydale Road - the A621 - crosses Springfield Road and Archer Road. By the way, Frances and Stewart and Little Phoebe have been living further along Archer Road since COVID brought them back to Sheffield from London. However, they will be moving out of that rental house before Christmas.