Speeding on motorway

Tothepoint.

Marktheshark wrote: »

The distance is "fixed" by the police cars computer by measuring the distance the trailing car travels .
It is a matched reading, the trailing car has to maintain a constant distance.

No, the lead car is timed between two fixed points, those two fixed points are measured by the police vehicle. The speed is then calculated.

Distance between the two and speed of the police vehicle is irrelevant.

Mercdriver

seatbeltnoob wrote: »

The safe driving distance is much more important than the actual speed IMO. Far too many times on the overtaking lane all these cars are tailgating each other with distance that you would ideally have at 30-40mph. It is quite hair raising when I see this, if there is a sudden slowdown in traffic you could expect a huge pile up.

I think it comes down to motorway capacity. the m1 should be a 5 lane motorway at the very least right now. This means the highways agency has to manage the motorway by have 40/50/60mph zones and have people tailgaiting each other for 4 hour stretches. Really really danbgerous and no wonder there are always accidents which adds 2hr delays for all motorists.

I agree. As an occasional passenger with my brother in law I use the virtual brake pedal frequently. I'd have no objection to increase in speed limit to 80mph since most drivers do that, and are largely ignored by police cars when doing so. Increase the speed limit and bring in the cameras that Germany has. There also needs to be a culture change to how people drive, in Germany people are less likely to lane hog in the first place and a single flash of the lights usually leads to malingerers moving across.

Bring the cameras in where they have the chevrons on the road to mark the 2 second gap. Wouldn't stop the whingeing about the police state though. Some people think that the police should enforce any law except the one that they happen to be breaking.

Mercdriver

Marktheshark wrote: »

They are defences to mitigate, you need the video from the police cars camera, it is not unknown for them to measure the distance and speed whilst gaining distance on the target car.

Have you ever noticed those squares in the lanes on roads and motorways? Police cars and helicopters use them and other fixed observation points to measure speed using video and other tools. They are set at a fixed distance and it can be done with the timer app on an iphone or a simple stopwatch.

seatbeltnoob

Mercdriver wrote: »

I agree. As an occasional passenger with my brother in law I use the virtual brake pedal frequently. I'd have no objection to increase in speed limit to 80mph since most drivers do that, and are largely ignored by police cars when doing so. Increase the speed limit and bring in the cameras that Germany has. There also needs to be a culture change to how people drive, in Germany people are less likely to lane hog in the first place and a single flash of the lights usually leads to malingerers moving across.

Bring the cameras in where they have the chevrons on the road to mark the 2 second gap. Wouldn't stop the whingeing about the police state though. Some people think that the police should enforce any law except the one that they happen to be breaking.

the speed of change is very slow. Bureaucracy is killing productivity in the country, infrastrcuture building takes too bloody long.

the cameras to work out safe distance between cars will probably take 10 years to implement. Public sector is archaic.

Steve456

Marktheshark wrote: »

The distance is "fixed" by the police cars computer by measuring the distance the trailing car travels .
It is a matched reading, the trailing car has to maintain a constant distance.

I think you need to go back to school and get a basic qualification in basic maths and physics.

The police car simply has to measure the distance plus the time the target takes to travel that distance. Why would it matter that they were gaining on the target vehicle?

Tothepoint.

Mercdriver wrote: »

Have you ever noticed those squares in the lanes on roads and motorways? Police cars and helicopters use them and other fixed observation points to measure speed using video and other tools. They are set at a fixed distance and it can be done with the timer app on an iphone or a simple stopwatch.

Since when have helicopters and iPhone apps been an approved method of speed detection?

Mercdriver

Tothepoint. wrote: »

Since when have helicopters and iPhone apps been an approved method of speed detection?

Model One eyeball, timing points at fixed positions and a timing device. A lot of police cars will use VASCAR, but they don't need one to enforce a speeding offence. Helicopters are used from time to time to measure speeds during a chase. They are also used to monitor speeds and the white box gives both them and ground units calibrated distances to get a speed measurement using the basic distance divided by time arithmetic calculation.

Car_54

Tothepoint. wrote: »

Since when have helicopters and iPhone apps been an approved method of speed detection?

The use of a stopwatch and a measured distance dates from about 1896.

The fact that the officer is in a helicopter rather than hiding in a bush is irrelevant.

Tothepoint.

Mercdriver wrote: »

Model One eyeball, timing points at fixed positions and a timing device. A lot of police cars will use VASCAR, but they don't need one to enforce a speeding offence. Helicopters are used from time to time to measure speeds during a chase. They are also used to monitor speeds and the white box gives both them and ground units calibrated distances to get a speed measurement using the basic distance divided by time arithmetic calculation.

Not many police cars will be fitted with VASCAR these days.

Throbbe

stator wrote: »

Even though motorways were designed for 100mph.

Don't suppose you have a reference to anything in the DMRB that states that do you, as I'm pretty sure it's 120kph and has been for a long time.