Will that affect bicycles ? A lot of our eastern European residents here cycle well above that speed on the pavement here !
Unfortunately bicycles are not subject to speed limits as such. A court ruled a few years ago that because they are not required to have a speedo there is no obligation on the rider to adhere to the limit. Trust me, anyone who rides for long enough knows exactly what speed they are doing on a bike through feeling alone.
Anyone who rides on the pavement is a fool. Anyone riding on a pavement that is shared use at 20mph needs a smack on the head. This is why I rarely use them because of the risk my speeds pose to pedestrians (especially kids) I may come across.