On a narrow stretch of road marked with a descent sign, it is hard to pass an oncoming vehicle because of an obstacle. Car A is going downhill, car B is going uphill. Which driver must give way?
Explanation
When passing is difficult on a downhill or uphill marked with road signs, the rules set a special priority rule: the driver going downhill must give way. That is because it is harder to stop and start again on an uphill.
KET reference: KET 139: If passing is difficult, the driver on whose side the obstacle lies must give way. On descents marked with road signs, when there is an obstacle, the driver going downhill must give way.