Core: Do not block the junction — even with priority

If you must stop to give way to other traffic, you keep the passage for the crossing traffic as clear as possible. That is why you may only enter a junction if you can drive straight through or clear it again quickly (Book p.103). This duty is not tied to who has priority. The book names only two exceptions where you may stop on the junction: traffic turning left on a priority road waiting for oncoming traffic to pass, and giving way to a priority vehicle (Book p.104). Neither exception says 'because you yourself have priority over the crossing traffic.' It follows that: even if you have priority over the crossing road, you still may not enter if the far side is at a standstill — the blocking duty binds a driver with priority too.