Don't think you will have much success there, be much easier to get the council to erect signs.
If there are signs already, you could tell council they are not working.
A well thought out proposal to council with what changes you think will work could have good success, especially if you get your neighbours involved as well.
The maps never are 100%. sometimes i get confused as to the way they send you and the errors in them but as usual people only remember the times they are wrong. Never the times they got you there in a hurry first time haste free.