PCs Mark Claxton and Martin Willis follow a speeding driver tailgating and measure his speed up to 100mph before pulling him over.

Britain's motorways are getting busier and with fewer officers on the road the motorway cops often need the public to tip them off about illegal cars and drivers

PCs Alderson and Infield find a rider being treated in an ambulance and a driver missing.

A dangerous pursuit through Bradford ensues when a car suddenly flees from the officers.

Being a motorway cop means having to listen to every excuse in the book: sometimes they're ridiculous and unbelievable, while other times it's down to the skill and experience of the cops to work out fact from fiction.

Officers from West Yorkshire attend a serious head-on crash in Bradford.

Sometimes being in the right place at the right time can lead to some surprising results.

The West Yorkshire motorway police are not easily surprised or shocked by what they come across on Britain's busiest roads, but when a drunk student in Leeds flags down PCs Dale Anderson and Mick McQuade asking for a lift to France, the two cops quickly realise they have an unusual problem on their hands.

The Motorway Cops are called to the scene of a head-on collision on the motorway near Birmingham city centre. A woman has died and officers have to clear the road and try to discover the cause of the accident.

Every year, more than 50 tonnes of heroin and cocaine are sold in Britain, but in the north of England a team of specialist roads crime officers are striking back at the multi-million pound business of moving illegal drugs around the country.

A jack-knifed lorry causes a tailback on the A1 motorway leading to an accident between two lorries, leaving a man dead and forcing the motorway cops to shut the road while they investigate.

Officers from the Central Motorway Police Group target cable thieves, a crime that is costing the country more than £1 billion each year and causing chaos to Britain's transport system.

The police deal with the growing problem of stolen cars and the damage the drivers cause.

The cops are forced to take some drastic action when two young men fail to stop for them. In the Midlands, officers in the Central Motorway Police Group have other worries, as they're force to close the M50 when a pedestrian is catapulted into traffic after being hit trying to help a stranded motorist.

The Motorway Cops catch up with the drivers who try to cheat the system, taking chances even though that may mean putting other people's lives at risk - and they find that the drivers who do this are often those they come across time and time again.

The Motorway Cops are involved in several high-speed pursuits and call on the assistance of the police helicopter, Alpha Oscar One, to help them track down stolen cars and drug dealers.

The motorway cops don't just have to find and arrest those they suspect of breaking the law, they also have to gather enough evidence as proof. But all too often the evidence they hope to rely on just isn't there, and it is one man's word against another's.

The Motorway Cops are seeking out drivers who are desperate not to get caught and they find that some people will take extraordinary risks just to get away from them.

Amid icy conditions, the Motorway Cops are forced to close the motorway.

The motorway cops are faced with organised criminal gangs from overseas who use Britain's motorways to travel up and down the country, from city to city, stealing to order. The problem is that, when the police stop them, the criminals claim not to understand a word of English, making the investigation tougher than ever.

The motorway cops crack down on truckers who fail to pay attention to the road ahead.

Despite the array of sophisticated equipment and computer data available to the Motorway Cops, it is often experience and a 'sixth sense' which allows them to sniff out those motorists who have something to hide - and when they do, the police often uncover much more than they expect.

The Motorway Cops crack down on criminals who use the roads to transport illegal goods.

The Motorway Cops come face-to-face with their worst nightmare as they are called to detain two women who are caught walking on the M6 motorway. As the PCs arrive the women make a run for it, into the path of a 44 tonne lorry. The accident forces a total closure of the M6 leaving motorists stranded in a 15 mile traffic jam and the cops locked in a life or death battle to save the injured women.

On the motorway, a moment's lapse of concentration can have devastating consequences and when a lorry is involved the results can be catastrophic. The Motorway Cops are called to an accident involving a 44 tonne lorry, causing traffic chaos and leaving three dead and many more injured.

PCs Griffiths and Toal are involved in a high-speed chase which takes them into Birmingham city centre, and PC Richard Elliot is called to a lorry park off the M6 where a gang has been disturbed while attempting to steal the load from the back of a lorry. Also, more than 20 motorway cops, a dog team and the West Midlands Police helicopter are involved in an operation to stop a gang involved in a cash-in-transit robbery.

At night, a lorry jack-knifes on an unlit section of the M6, and two cars have ploughed full-speed into the underside of its trailer. The roofs of both cars have been taken off in the impact, and one man is dead. But, miraculously, three others have survived. It's up to PCs Elliot, Bullard and Shail to find out if this was simply the hand of fate or if someone is to blame.

The Motorway Cops are after runaway drivers including a stolen high performance car with a determined thief at the wheel. The thief is so determined that he risks a head-on crash as he drives the wrong way down the motorway, leaving the cops to launch a city-wide search for him.

The Motorway Cops help stop a stolen lorry on the rampage in the city centre. Elsewhere it's guile which catches people who are economical with the truth.

The police officers who patrol Britain's motorways are under pressure like never before. The number of cars and lorries using our congested roads grows every year but, across the country, the number of cops who patrol the motorways has been cut.

The Motorway Cops crack down on drivers who disregard the law and deal with the trail of destruction left by those who take dangerous risks on the roads. The cops hear some poor excuses and tackle some difficult drivers. PCs Paul Finlayson and Tracey Cope are called to a crash between a car and a lorry on the M6. The car's a write-off, and it seems the driver's been drinking, although he plays it down, and even tries to fool the breathalyser - twice.

In 2008, BBC cameras filmed two Swedish sisters throwing themselves into traffic on the M6. When it was shown on BBC One, nearly 7 million viewers were glued to their screens, and millions more watched it later on YouTube. The footage was shocking. One previewer wrote "On no account miss this documentary. It opens with what is perhaps the most extraordinary footage I've seen on TV".