Cycle campaigning

Campaigning for lower speed limits not only gets motorists backs up, including those who are also enthusiastic cyclists, it is ineffective, because London motorists don't obey the limits we have anyway and lowering them will change nothing.

Typically within Hull, 20 mph zones have achieved reductions[106] in injury accidents of:
— Total accidents -56 per cent
— Killed & seriously injured accidents -90 per cent
— Accidents involving child casualties -64 per cent
— All pedestrian accidents -54 per cent
— Child pedestrian accidents -74 per cent.
It is estimated that at the end of 1999, 390 injury accidents had been prevented within the 20 mph zones which had been previously installed. 122 of these would have involved injuries to children.

http://www.publications.parliament.uk/pa/cm200102/cmselect/cmtlgr/557/557ap80.htm

The new 20mph zones will be policed by ANPR average speed cameras so will also detect uninsured cars, tailgating, erratic driving etc.