Give way duty signs 3

The give way duty traffic sign informs us of the duties which are expected of us. B16: Main road (theory test: reply yes to general speed 80 km/h and reply yes to all side roads entering the main road, have give way duty yield absolute). B17: Main road is ending (theory test: reply yes to 80 km continues, but only if there is not a local speed limit sign or a beginning of another area or speed traffic area sign). B18: Give way for oncoming traffic (theory test: reply yes to give way for oncoming, even if this traffic sign is placed upside down). B19: Oncoming traffic must give way (theory test: if our speed is low reply yes to speed up a little because we have the right to go first, unless it is not possible).