The Warwickshire and West Mercia police forces have moved a further step towards their goal of operating joint services.
They say their "strategic alliance" will help them to meet a funding shortfall of £30 million by 2015.
The forces are keeping both names and deny the changes are a merger. However, they could lose one of their chief constables and operate from a single control room in the future.
Andy Parker, Warwickshire Chief Constable, said the two forces will now be operating the same.
As well as warning motorists to take care, police officers have also warned farmers of their legal obligations to help keep roads safe.
It comes as officers warned of a seasonal increase in the number of accidents reported during the harvest.
Ch Insp Steve Owen, from Warwickshire and West Mercia Police's joint operations department, said legal action would be taken against anyone found to be breaking the rules.**
Every year we face problems with agricultural vehicles leaving large amounts of mud and debris on the roads during the harvest season.
While the majority of farmers take steps to ensure they keep the roads clear and safe, not all are as diligent.
We would like to remind farmers and contractors of their responsibilities under the Highways Act.
We have already taken action against offenders who haven’t complied with this legislation and will continue to take a tough stance against anyone who we believe is being reckless and irresponsible.
Farming vehicles should pull into lay-bys to let traffic pass during busy times, he said, and need to make sure their vehicles are clear of mud before hitting a public road.
Officers have also warned motorists to take extra care and avoid dangerous manoeuvres.
Slow-moving tractors and extra mud on road surfaces during harvest season means motorists need to take extra care on the region's rural roads, police have warned.
As farmers across the region prepare to harvest their crops, the Safer Roads Partnership run by Warwickshire and West Mercia Police revealed the increase in farming activity at this time of year traditionally leads to a surge in the number of accidents.
They say drivers often take unnecessary risks such as overtaking at inappropriate points or speeding, not leaving themselves enough time to stop if they unexpectedly come across a slow-moving tractor.
The amount of mud and other debris on the roads also increases, making the surface slippery and more difficult to stop on.
A former police constable has pleaded guilty to making indecent images of a child.
Warwickshire Police said Robert William Tedds also admitted five counts of outraging public decency when he appeared at Redditch Magistrates' Court today.
Tedds, of Grange Road, Leamington Spa, asked for ten other counts of outraging public decency to be considered.
The 58-year-old, who no longer works for Warwickshire Police, was bailed to appear for sentence at Worcester Crown Court on August 2.
Police have apologised to motorists tonight after closing the M6 motorway during peak time for the Bank Holiday getawayRead the full story ›
Warwickshire Police have admitted the theft of money from their former headquarters in Leek Wooton is 'hugely embarrassing' for the force.
54 year old retired officer, Paul Andrew Greaves, formerly of the Stratford area, will appear before magistrates in Leamington on May 22 charged with theft.
The theft of cash from Warwickshire Police was hugely embarrassing and a lengthy and painstaking investigation has been conducted. The charging of the suspect Paul Andrew Greaves was a major step forward and we now await the court process. Any police officer or police staff member who commits a crime can expect to be dealt with robustly and receive little sympathy from colleagues or the public alike.
Warwickshire Police were criticised for taking the decision not to name Mr Greaves after he was formally charged on Wednesday. The Police and Crime Commissioner for Warwickshire has called for a review into the incident .
We advise forces, working with the CPS, to name those who have been charged and that position will not change. When an individual has been arrested our current guidance is not to name them and we will only release the name for the prevention or detection of crime, or if there is a serious public interest."
Warwickshire Police have apologised for failing to name a retired police officer charged with theft. They received criticism following the decision on Wednesday.
In their latest statement on the issue, the force say they never intended to "mislead the public."
This issue was not about secrecy or protecting an ex police officer. This change was part of aligning policies and practices with West Mercia Police.
54 year old Paul Andrew Greaves, of Belvoir Lodge, Carlton, Nottinghamshire and formerly of the Stratford has been charged with the theft of £113,000 from the former police headquarters at Leek Wooton.
He will appear in court in Leamington on 22nd May.
The Police and Crime Commissioner for Warwickshire has called for a "full and frank report" on the decision by Warwickshire Police not to name a theft suspect who was charged.
They have since identified 54 year old Paul Andrew Greaves, from the Stratford area, a retired police officer.
Ron Ball, released a statement through his Deputy Commission, Eric Wood.
We will be seeking assurances that in future all national guidelines are adhered to. We are committed to ensuring that Warwickshire Police operate in an open and transparent manner and that lessons have been learned from the mistakes of the last 24 hours."
Warwickshire Police have been forced to name a former police officer who has been charged with theft.
Yesterday, 54 year old Paul Andrew Greaves, a former retired police officer, was charged with the theft of £113,000 from the former Police HQ at Leek Wootton. Warwickshire Police decided not to release his name on grounds that it was "not appropriate".
We accept that our decision not to name im was wrong and inconsistent with the current national guidance. We apologise that our previous approach has not been consistent with this.
Warwickshire's Deputy Police and Crime Commissioner, Eric Wood, has issued a statement saying that he believes it is in the public interest to name individuals charged with serious offences.
Warwickshire Police have issued a statement after a retired police officer was charged with theft, but not named.
In keeping with the force national policy Warwickshire Police does not name suspects on arrest. The force may, however, name suspects on charge unless it is inappropriate to do so. In the case in question it is inappropriate to name the person at this time."
The force say they have received feedback on the issue since the man was charged and they will be reviewing their policy.
A 54 year old man from the Stratford area was charged with the theft of £113,000 from the former Warwickshire Police headquarters at Leek Wootton.
He will appear before magistrates in Leamington on 22nd May.