Work will begin next week to install speed cameras on the road in West Norfolk where the Duke of Edinburgh had a crash earlier this year.
Prince Philip wasn't hurt in the incident on the A149 near the Sandringham estate in January, but a female passenger in the other car broke her wrist.
The Prince had been leaving the Queen's estate at nearby Sandringham when the crash happened.
According to councillors, there have been three deaths on the stretch of road between King's Lynn and Snettisham since 2013, as well as 50 injuries.
Work to install the cameras between the Knights Hill and Snettisham roundabouts will start overnight from Monday and should take around three weeks.
The road will remain open at all times with traffic lights directing people through overnight lane closures.
"I know this particular road extremely well, having travelled it over a number of years," Norfolk Police and Crime Commissioner Lorne Green said.
"I’ve long held the view, shared by many and supported by the figures around collisions, that action is needed to improve its safety.
“The Norfolk Safety Camera Partnership approved the speed cameras back in 2016. I’m pleased that the partnership’s proposals are finally being actioned and work to install the cameras is now getting underway.”