>>1673501Better than first come first go. At least you can't reinterpret "right" to suit your own hurry.
Also in Germany an unregulated T-intersection goes by priority to the right unless there is no street to your right in which case the normal rules for left turns across opposing lanes apply (since when going straight you'd have priority anyway). In OP's example this would theoretically mean that the silver would have to signal the turn and stop right before the turn, then the black car would have to drive up to silver's rear, then blue can go through, then silver can turn and then black can go. In reality most residential intersections aren't spacious enough for this so realistically black would give a hand signal for silver to turn, then black themselves would turn and finally blue would go, unless the driveway black is leaving is so narrow that silver can't enter without black leaving first, in which case silver would give a hand signal for black to leave, afterwards it would automatically become blue's turn but to avoid confusion further hand signals between silver and blue would be advisory. Practically speaking I can't recall ever encountering such a situation in thirteen years of driving so far, or four cars at a four way stop for that matter.