Raising speed limits

Today i found out the government plans to raise the speed limits for LGVs on single and dual carriageways to 50 and 40 mph respectively. That is good news. even though i am totally against raising limits elsewhere. This will save lives. How? Because the nearest misses i see on a regular basis are those almost caused by impatient idiots trying to overtake me when i am stuck at 40 on a road designed for higher speeds. Not everyone is just involved in near misses. Some people die in head on collisions. Not just the guilty. My only complaint with this change is that the idiots will still be out there...