More than half of Bristol's fixed speed and red-light cameras will be switched back on in the new year.
Work will start in January or February to upgrade then reactivate up to 26 of the 37 yellow boxes on the city's roads which have been off since 2011.
It is a move exclusively predicted in last month's Bristol Post after Avon and Somerset police, the city council and Police and Crime Commissioner Sue Mountstevens have been in discussions for some time.
There will be an initial cost to upgrade the devices but once they are ready to go, the authorities are hoping it will be self funded through the £60 fines drivers who go on speed awareness courses have to pay.
B&NES Council is still considering a similar move in this area, but if it did go ahead then the only places with modern enough speed cameras are Saltford and Pensford.
Mayor of Bristol George Ferguson will officially announce the move that will not please every motorist at a special road safety summit at City Hall this afternoon.
"While the number of those killed or seriously injured on our roads has reduced recently there are still too many incidents, especially those involving pedestrians and cyclists," he said. "This summit will help us review our policies to ensure we have the right designs and procedures in place and are doing enough to reduce speeds and increase the visibility and awareness of vulnerable road users.
"In the first instance I have asked officers to start work on preparing speed cameras to be switched back on and boost the number of community speed watch programmes in the city. These measures will boost other efforts to improve the way we all get around the city such as the 20mph zones that are currently being rolled out.
"Everyone wants safer roads and pavements but it requires a joint effort on the part of all road users and pedestrians to make it happen."
Although mobile speed cameras and community speed watch (CSW) schemes have been in operation, fixed cameras were switched off when funding ceased from central government.
There were 147 people killed or seriously injured on Bristol's roads in 2012, a seven per cent reduction from 2011.
Meanwhile, the total number of casualties went up by 18 per cent to 1,338.
Chief Constable Nick Gargan said: "I am pleased that the cameras are going to be switched back on. National research shows that they have a positive impact on driver behaviour and we have been working with the council to identify a cost neutral way of reactivating them.
"We are also very supportive of additional community speed watch groups in the city. In areas in the force where we have thriving CSW groups they play a significant role in helping to tackle speeding in the area.
"The aim of these measures, and of the road safety summit more broadly, is to identify ways in which the police, our partners and the public can all work together to make Bristol a safer place for all road users."
The road safety summit is expected to attract more than 120 people to hear about the council and police's vision for more tolerance on the city's roads and greater respect between different types of road user.
Commissioner Sue Mountstevens said: "People are passionate about road safety and I know from the comments I receive in my mailbag that it can really divide people.
"It's important to involve local people in improving road safety. There are lots of ideas and initiatives for tackling the issues that really affect people such as cycling on pavements and speeding cars. By coming together like this we can hear from residents and tell them about the fantastic ways they can improve their area such as by joining their local community speed watch."
