Sharing roads with cars...!!

In SA there is a brand spanking new RTA legislation which insists that motorists MUST pass a cyclist and allow 1.5m.
Drivers are even allowed to cross double lines, if safe, to do this to ensure that cyclists are kept safe.
I would like this same legislation to include WALKERS/HIKERS who are walking on (the side of) roads.
I live in a rural area and try very hard to not walk on the bitumen road especially during daylight "traffic" hours, but when I have to, not all the cars and heavy vehicles pass by me and exercise caution or due care.
Many cars and the heavier vehicles just rip past and don't even yield, and if it is dark, many don't care to dim their high beams.
When I say rip, I mean they are clearly exceeding the marked speed limits, displacing considerable air, and almost the sound barrier as well.
(I only have my head torch accidentally aimed high towards their windscreen to return the pleasure
)
Many sections of marked walking trails need to follow a road so it isn't just specific to where I live in this country.
This is just my feeble attempt at changing a horribly entrenched driving attitude that is getting rewarded with a lot of press time and back slapping.
The point of my topic is can a crowd of concerned like minded walkers generate a movement which can get some understanding with governments to change legislation so that walkers/hikers can also feel safe on the roads?
Drivers are even allowed to cross double lines, if safe, to do this to ensure that cyclists are kept safe.
I would like this same legislation to include WALKERS/HIKERS who are walking on (the side of) roads.
I live in a rural area and try very hard to not walk on the bitumen road especially during daylight "traffic" hours, but when I have to, not all the cars and heavy vehicles pass by me and exercise caution or due care.
Many cars and the heavier vehicles just rip past and don't even yield, and if it is dark, many don't care to dim their high beams.
When I say rip, I mean they are clearly exceeding the marked speed limits, displacing considerable air, and almost the sound barrier as well.
(I only have my head torch accidentally aimed high towards their windscreen to return the pleasure

Many sections of marked walking trails need to follow a road so it isn't just specific to where I live in this country.
This is just my feeble attempt at changing a horribly entrenched driving attitude that is getting rewarded with a lot of press time and back slapping.
The point of my topic is can a crowd of concerned like minded walkers generate a movement which can get some understanding with governments to change legislation so that walkers/hikers can also feel safe on the roads?