They're actually for a walking/bike trail in a park. They don't need to be made to a particular spec, they just want them to look like "real" signs.What grade of reflective?
Are you looking for a printed or plotter fabrication?
Those look like they are intended for roadway, what does your local MUTCD specs call for?
The nice folks on the "Friends of..." committee asked a state park for guidance and some overzealous DNR officer told them they needed to be reflective but didn't give them actual specs.Hahaaaa...... then why do they need to be reflective ?? Is there that much night-time travel around ??