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The city says the changes are part of routine assessments to determine if posted speed limits match uses and conditions on specific streets.

The slower traffic speeds were approved by the city council Tuesday night. Tucson Mayor Regina Romero and councilwoman Nikki Lee were absent from Tuesday night’s meeting.

Enforcement of the new speed limits won’t be immediate.

That’s because the speed limits cannot be enforced until the new signage is posted, said Erica Frazelle, a spokeswoman for the Tucson Department of Transportation and Mobility. That will be happening in the next two to three months, she said.

The changes were based on city staff assessment of existing speeds, “Based on several factors, including speed limit studies, surrounding land uses and roadway conditions, it was determined that several roadways require speed limit adjustments,� Elizabeth Morales, an assistant city manager, said in a .

These speed changes are something that happens annually, Frazelle said, and is usually decided after enough requests for a speed limit change are made with the department.

“All of the requests that came in are from citizens with the concern of safety,� Frazelle said. “So, they are submitting their requests through (TDOT concerns or 311), with safety in-mind and with those, are traffic engineering looks at the data, the volumes, the speed data (and) analyze any crash data that’s out there to determine what the next steps are.�

Frazelle did not have an estimate as to how many requests were made for the roadways now seeing speed limit-reductions.

“Per requests, as they come in, traffic engineering goes out and evaluates those roadway segments where the requests came in, and then they evaluate to see if they’re warranted,� Frazelle said.

Requests can be made to the city’s transportation department through Tucson’s non-emergency line, 311. To make a request, you can call 311 to speak with a person directly, submit its web-based portal, or download the Tucson 311 app to submit a request electronically.

More information on 311 can be found at:

There are the streets across Tucson where speed limits will be reduced:

East 22nd Street from Interstate 10 to South Park Avenue will be reduced from 35 mph to 30 mph.

West 36th Street from the west end of the road to South Mission Road will be reduced from 35 mph to 30 mph.

South Alvernon Way from East Broadway Boulevard to East Concord Stravenue, will be reduced from 40 mph to 35 mph, except for portions in unincorporated Pima County

South Alvernon Way from East Concord Stravenue to East Valencia Road will be reduced from 45 mph to 40 mph.

East Broadway Boulevard from South Country Club Road to South Wilmot Road will be reduced from 40 mph to 35 mph.

West Grant Road from North Silverbell Road to North 15th Avenue will have speeds reduced from 40 mph to 35 mph.

West Ironwood Hill Drive from the city limits to North Greasewood Road will be reduced from 45 mph to 40 mph.

West Ironwood Hill Drive from North Greasewood Road to North Silverbell Road will be reduced from 40 mph to 35 mph.

East Old Spanish Trail from East Broadway Boulevard to East 22nd Street will be reduced from 35 mph to 30 mph.