Non-lawyer here, can't figure out how Somerville gets away with $100+ parking fines

[sparr0.livejournal.com]

https://malegislature.gov/Laws/GeneralLaws/PartI/TitleXIV/Chapter90/Section20A and https://malegislature.gov/Laws/GeneralLaws/PartI/TitleXIV/Chapter90/Section20A1~2 appear to be the two options a MA city has when instituting regulations by way of a traffic commission and parking clerk. They differ slightly. One allows mailing of tickets, establishes default fine amounts if a city passes none, and has a $25 ticket limit ($100 for bus stops), the other a $50 ticket limit ($100 for bus stops and fire hydrants). One has some extra requirements specific to Boston and Cambridge.

So, how is it that the Somerville Traffic Commission has multiple $100 and $200 fines on their books?

(EDIT: I've struck out the fines that comments below have found legal justification for)

Bus Stop $100 90 MGL 20A / 90 MGL 20A 1/2
Obstructing Posted Fire Lane $100 89 MGL 7A
Obstructing Handicap Ramp $200 40 MGL 22A
Within 10 ft. of Hydrant $100 90 MGL 20A 1/2 only, does not apply to cities that mail tickets to people
Handicapped Parking $200 40 MGL 22A
Declared Snow Emergency:
Tow Zone/Obstructing Snow Plow $100
Within 10 ft. of Hydrant/Designated Fire Lane $100 covered above
Within 20 ft. of an Intersection $100

(and this is assuming they never mail parking tickets to people, which would make the list of problematic ticket amounts much longer)

I expect that there are further statutes allowing some of these, specifically. I would not be surprised to find a state statute allowing exorbitant fines for handicapped parking violations. However, I can't find any of them. Help?

Comments

[sparr0.livejournal.com]

Thanks. I expected the handicap fine but couldn't find it myself. The snow removal still doesn't appear to cover a specific fine, so it would still fall under the limits in chapter 90