Gray-top meters are short term, 2-hour meters.  They are placed in and around the Downtown Square area for customers of the businesses.  The cost is $0.25 per hour.  The red-top meters are long term, 10-hour meters.  These are placed a little further away from the Downtown Square, but they provide less expensive rates.  The cost is $0.25 per 1 hour and 40 minutes.  This is to encourage downtown employees to park at these meters and leave the more convenient, closer meters available for customers visiting the area.