Police in Oxfordshire have said speed enforcement does work as they switched back on speed cameras that had previously been a victim of spending cuts.
A total of 72 fixed camera sites and 89 mobile sites in the county will start functioning again, Thames Valley Police said.
Oxfordshire County Council cut the authority's road safety grant, meaning the cameras were switched off on August 1, 2010.
The latest move means anyone caught speeding will probably face a fine, points on their licence and an increase to their car insurance premium.
Superintendent Rob Povey, head of roads policing for Thames Valley, said: "We think this is important because we know that speed kills and speed is dangerous.
"We have shown in Oxfordshire that speed has increased through monitoring limits and we have noticed an increase in fatalities and the number of people seriously injured in 2010. We know that speed enforcement does work as a deterrent to motorists."
Data released by Thames Valley Police shows in the six months after they were switched off, 83 people were injured in 62 accidents at the site of fixed cameras.
The figure for the same period the year before (August 2009 to January 2010) was 68 injuries in 60 accidents.
Across Oxford, 18 people were killed in road traffic accidents in the period, compared with 12 people the year before. The number of people seriously injured rose by 19 to 179.
Mr Povey said the money for switching on the cameras came from cutting back office costs and funding diverted from speed awareness courses.
Copyright © Press Association 2011