Why council backed 25 mph on Canton Street—even with most drivers near 30

Alpharetta City Council voted 7–0 on Sept. 14 to reduce Canton Street’s speed limit north of Milton Avenue from 30 mph to 25 mph and petition the Georgia Department of Transportation for approval.⁠[1]

The telling detail is the enforcement argument. The city’s minutes acknowledge that most motorists traveled near the existing limit. But officials argued that 30 mph left relatively little enforcement margin, while 25 mph would provide a more meaningful threshold for targeted speed enforcement. That was part of the case for the reduction—not a finding that most drivers were traveling far above 30.⁠[1]

There were much faster vehicles, too. According to the minutes’ summary of a Public Works analysis prompted by citizen complaints, multiple vehicles south of Lily Garden Place were recorded between 50 and 59 mph. Northbound 85th-percentile speeds there ranged from 34 to 37 mph, compared with 30 to 32 mph north of Lily Garden Place.⁠[1]

The study reported approximately 5,100 to more than 10,300 vehicles per 24-hour period. The city also offered a consistency argument: Canton Street was the only one of the four primary approaches to the downtown intersection posted at 30 mph; the other three were already at 25.⁠[1]

The September vote establishes the city’s decision, not confirmation that the posted limit has changed. The reviewed minutes and agenda do not establish Georgia DOT approval, an effective date or installation of new signs.⁠[1][2]