What makes Alabama different
The practical result is that two drivers cited at the same speed in different parts of Alabama can owe amounts that differ by more than the fine itself. The estimate on this page is assembled from what courts across the state actually charge rather than quoted from a schedule, and the citation for it says so.
The other thing to establish early is which court holds the case. A municipal officer writes into a municipal court and a state trooper or deputy writes into a district court, and those two forums differ in procedure, in cost and in what they are willing to do with a first offence.