Illinois is looking at authorizing automated speed enforcement within "safety zones". They have defined these as follows

an area that is within one-fourth of a
mile from the nearest property line of any facility, area, or
land owned by a park district, school district, community
college district, or public or private college or university
that is used for recreational or educational purposes; provided
that if any portion a roadway is within that radius, the safety
zone also shall include the roadway extended to the furthest
portion of the next furthest intersection.

Is there currently a utility that would allow me to visualize this at a crude level? IE, draw a bubble arround any point or area that had a tags x, y, or z?

Thanks for any references...