I figured that would be the case. So, can I say that the sign has deteriorated to the point that it's not a noticeable 'Do not turn right' sign? And if all else fail, can I somehow negotiate my way into having the fines reduced? Cause honestly, if it wasn't my dad, it probably would've been me doing...

I've lived in this house over 20 years now. I've made this improper right turn more times I can count. If I don't make it, I have to drive around a whole block and over the course of 20 years, that is a substantial amount of time/fuel wasted. I don't even know why there's an improper right turn sign...