25 feet
2405.2 d
No person shall stand or park a motor vehicle within 25 feet of the approach side of any "stop" or "yield" sign located at the side of the roadway.
50
50 ft
You are generally not allowed to park within 30 feet of a stop sign.
30 feet
In Texas, you must park at least 30 feet away from a stop sign.
In most places, you can legally park at least 10 feet away from a no parking sign.
50 feet
5 feet
30 feet
In my state: Washington - you may park no closer than 20 feet to a crosswalk, and no closer than 30 feet to a stop or yield sign, and no closer than 15 feet to a fire hydrant. Your state may well have different regulations.
25 feet
You should not park within 15 feet of a no parking sign to comply with most local laws and regulations.