What do the sections that are green but have no (P) icon or time limit? Unlimited parking? The legend doesn't say. It's also interesting to note that the sec

What do the sections that are green but have no (P) icon or time limit? Unlimited parking? The legend doesn't say. It's also interesting to note that the section heights are not proportional; they range from 1 hour per unit during morning rush to 7 hours for mid-day. At first glance, it makes it seem parking is prohibited for nearly half the day during the work week, while in actuality it's just 4 hours.