Change the rules around road signage for motorists

I feel that often, when it comes to fining motorists, signs are small and put high up and just before the zone, e.g. with bus lanes, there is one sign just before you enter and I feel its small and has lots of information such as times and dates etc, and by time you see it, it may already be too late. I believe that people should be focused on the road for safe driving, rather than looking out to not get fined.