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According to F.S. 316.183 the maximum speed limit in a residential district is
On all streets or highways, the maximum speed limits for all vehicles must be 30 miles per hour in business or residence districts, and 55 miles per hour at any time at all other locations. However, with respect to a residence district, a county or municipality may set a maximum speed limit of 20 or 25 miles per hour on local streets and highways after an investigation determines that such a limit is reasonable. It is not necessary to conduct a separate investigation for each residence district. The minimum speed limit on all highways that comprise a part of the National System of Interstate and Defense Highways and have not fewer than four lanes is 40 miles per hour, except that when the posted speed limit is 70 miles per hour, the minimum speed limit is 50 miles per hour.
Source: Florida Statutes and Constitution
