Average speed cameras are being installed at eight sites across Lancashire, including two in Preston.
Two main routes into the city, the A59 Brockholes Brow and the A6 London Road, will have new cameras.
The project is being carried out in a bid to reduce the numbers of road casualties.
The eight locations are where 13 people lost their lives between January 2011 and October 2016.
Where is it up to?
Cameras have been put in place in London Road, Preston, although they have not yet been activated.
Bosses say they are undergoing a period of “testing and configuration”, with enforcement likely to begin in March. Installation has also now begun on the second route in Belmont, with work on all sites expected to be completed by mid-November.
What’s the reaction?
Lancashire Police’s Assistant Chief Constable Tim Jacques, chairman of the Lancashire Road Safety Partnership, said: “We don’t want to catch you speeding.
“Our primary aim is for all drivers to adhere to the safe speed limits on our roads, and these particular roads are proven to be amongst some of our most dangerous. “It is well researched and documented that speeding can kill, but we know that a combination of education, engineering and enforcement can change behaviours and save lives.”
Clive Grunshaw, Police and Crime Commissioner for Lancashire, said: “In an ideal world drivers would observe the speed limit and we would never have speed related casualties and deaths; but we all know that that is not the case.
“The casualty toll on these routes has to be tackled and therefore I am pleased that the Lancashire Road Safety Partnership is investing to make these routes safer for all.”