A man on the radio says, "Many drivers find it very confusing that
every type of zone has its own speed limit.  No two zones have the same
speed limit.  In addition, there are too many types of zones -- we have
School Zones, Hospital Zones, Library Zones, Residential Zones, and
Freeway Zones.  This is more than we need."

A woman on the radio says, "I believe that both Hospital Zones and 43
mile-per-hour zones need to be reconsidered."

A man on the radio says, "Possibly, but I think it's a much more
pressing problem that the color of speed limit signs in School Zones is
blue."

The woman on the radio responds, "What color would you suggest?  Green
is already taken by 59 mile-per-hour zones."

On the radio, a second woman enters the conversation.  "Yes, but both
School Zones and 27 mile-per-hour zones have large signs, while Library
Zones -- not to mention 43 mile-per-hour zones -- have only
medium-sized signs.  It doesn't seem appropriate somehow."

The man on the radio says, "Now I've forgotten -- is the speed limit in
a residental zone 17 or 23 miles per hour?"

The first woman on the radio says, "I can't remember, but I know that
either School Zones or Hospital Zones are 23 miles per hour."