Revenue NSW data shows detection increased at almost 20 Tamworth streets between 2019 and this year, after the state government stripped mobile speed cameras of signs and reflective markings.

Since 2019, 49 speeding detections were made southbound on Goonoo Goonoo Road at West Tamworth, earning state government coffers $6795.

It was followed by the same road at South Tamworth headed northbound with 41 detections at $6191.

Manilla Road at Oxley Vale saw 17 drivers caught and almost $5000 handed out in fines.

Next on the list was Duri Road at South Tamworth with 14 fines at $4569 and the main drag Peel Street with 25 at a total of $4232.

The decision to make speed cameras anonymous would save lives, Transport for NSW safety, environment and regulation deputy secretary Tara McCarthy said.

"Automated speed camera enforcement is one of the most effective, evidence-based and low-cost measures to reduce speeding and save lives and injuries," she said.

"Research shows that best practice mobile speed camera programs with sufficient hours, a high number of enforcement sites, unmarked and unsigned operations and highly randomised deployment can deliver consistent, network-wide 20 to 30 per cent reductions in casualty crashes."

Read also:

Streets for speed cameras are picked based on crash history, police information and community nominations. The New England Highway near Nemingha had detections headed east, south and west totalling $7351 in some 41 detections.

Calala Lane at Calala raked in $2966 with 23 detections, Ebsworth Street had 14 and Fossikers Way at Attunga had nine.

Ms McCarthy said independent modelling from Monash University's Accident Research Centre estimated the changes might save between 34 to 43 lives and prevent 600 serious injuries in the state each year.

"Every cent from mobile phone detection, speed and red-light camera revenue goes directly into the Community Road Safety Fund, which is used to fund important road safety programs such as road safety upgrades to our roads, education programs and school zone flashing lights," she said.

The data includes mobile speed cameras, red light and static.