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Video-equipped is my blog that shares and discusses everything there is to know about advanced driving and advanced driving techniques. In the fullness of time we'll have news, views and reviews of all things 'driving'. The aim of the site is to share knowledge and promote increased skill and healthier attitudes in the average driving community - skills and attitudes which are sadly very much lacking.

Friday
Mar122010

Plans For New Speed Cameras On All Motorways  

Average speed cameras could be fitted on all of Britain's motorways if new proposals to slash carbon emissions are approved by the Government. 
Safety Cameras lead to fewer accidents and speeding tickets on the roads where they are installed than normal speed cameras, a new report by the Government's environmental adviser’s claims.
  
The Sustainable Development Commission is calling for cameras to be installed on all motorways in the UK because it is predicted that if all drivers stuck to a 70mph limit, the UK's carbon emissions would be cut by 1.4 million tonnes. 
In its report the Commission says drivers slam on the brakes when they see a speed camera and accelerate away as soon as they have passed it.
 
But, it argues, average speed cameras, which measure speed over distance rather than one point, encourage smoother, more environmentally-friendly driving. 

The call for more average speed cameras comes days after London Mayor Boris Johnson announced the devices would be introduced on the A13 in East London. 
The Government is poised to approve a new generation of cameras that can trace the speed of journeys over a network of streets. If this goes ahead the devices will be fitted on all urban residential roads with a 20mph speed limit.
 
The report also suggests capping all cars to make it impossible to break the speed limit and teaching motorists "eco-driving" techniques. 
Car sharing clubs should also be encouraged to grow and the use of technologies such as video conferencing should be used to reduce the need to travel, the report says. 

[source Road Angel]

 

Thursday
Feb192009

Question on Hazard Perception Tests

hi, thanks for the hazard perception commentary clip, very useful as I'm training to be an ADI, but I'm struggling with the hazard perception element of the theory test. Could you offer me any advice please? I am either clicking too early, so outside the scoring window, or am clicking late so only scoring 3's. I am very concious of clicking too many times as this discounts any score, and have made this mistake during practice. Is the scoring window open when the vehicle being used to film actually starts to make an adjustment? (either speed or direction). Thank you for any pointers.

Reply:

Oh I hate these computerised hazard perception tests, I feel they are so unreal and hard to operate - i have the same kind of trouble as you with the ones I have tried in the past!

One would like to think the scoring window is open even once the host vehicle has begun to deviate, but I suspect from what you say this is not the case (and you can see a certain logic in this, because it means you are now dealing with the hazard, not spotting it in advance).

My best advice would be to go over the system of hazard perception you are using - for example, are you keeping up the scanning; are you starting at the horizon and working forward and constantly re-adjusting the distance of your vision so that you are picking up things well in advance, far off. (This is one of the reasons I hate the computer systems, because you cannot see the detail in the distance. Nor can you adjust your position - both fundamental parts of good hazard perception.)
nik

Monday
Feb022009

Is traction control your enemy in the snow?

Traction Control is fitted on many modern cars, designed to help prevent and control skids and loss of traction. It may not however be your best friend in the snow.


The issue that you may face is that when the traction control detects slip at the wheels, it reduces the power to the wheel. (This can be by cutting power at the engine, or on more sophisticated systems by braking the slipping wheel).

On the whole this would seem to be a good thing - when setting off, for example, it reduces slip. If you accelerate it can also control slip. And if the car teeters sideways, then the correction at the wheels is intended to bring it back on track (and generally does. I once tried putting my Saab 93 Aero sideways in the snow using the handbrake - with ESP on I barely got more than 30 degrees out of kilter. With it turned off, I nearly totalled a road sign.)

So why is reduced power to the wheels a bad thing? One word: hills!

Trust me - this is the word of someone who has, in the past, become stranded on hill because he couldn't turn the traction control system off fast enough (a system limitation, I might add). You see, what happens as your car begins to climb a slippery hill is the drive wheels, not surprisingly, begin to slip - especially if the car is front-wheel drive. As they begin to slip the traction control system reduces power. But you're going uphill - so reduced power means you slow down. And if this process continues, before long you can be stationary. Then you might not get going again. 

You might argue that the traction control detects loss of grip, and if there is no grip you can't get up the hill anyway. Well, it's not necessarily true. The traction control system is not able to perfectly measure the co-efficient of friction between the wheels and the snow and also has a necessary characteristic called hysteresis. In simple terms, it's only an approximation- it might not know, for example, that spinning the wheels to dig down through the surface snow might find grip underneath; it will never let you do this.

So, be warned. I don't recommend turning your traction control off in slippery conditions, but be ready to turn it off if you are approaching an upward hill. Check, too, that your car allows you to do this - some cars only allow it when they are below a certain speed. As ever, be prepared.

Wednesday
Sep242008

mooo-ve over...

This story from the BBC caught my eye:

Pile-up as cow strays on motorway
An escaped cow caused a five-car pile-up when it strayed on to a major motorway in West Lothian. Motorists and passengers escaped with minor injuries after the animal wandered onto the eastbound carriageway of the M9 near Winchburgh.
As the first vehicle dodged the lost cow, it collided with another car - starting a five-car crash. Two fire engines were called to the scene at about 2130 BST on Tuesday. The cow died at the scene. Sgt David Gray, of Lothian and Borders Police, said: "The people had a pretty lucky escape. Unfortunately the animal did not."

This just goes to show what we all know and should repeat to ourselves when we get in the car: Always expect the unexpected.

Cows are reasonably large and slow moving objects (as a rule they don't suddenly materialise in your lane), so the fact this accident caused a five car pile up probably goes to highlight something we all know: drivers drive far too close on motorways and do not look far enough ahead.

Tuesday
Apr292008

Satellite Navigation units make journeys safer and faster

New GPS research carried out in Taiwan suggests that drivers using in-car satellite navigation systems take less time to reach their destination, and they may drive more safely too.

One group of drivers were involved in the research each using in-car satellite navigation systems to reach a variety of urban and rural destinations they had never travelled to before. Another group of motorists were also asked to use paper maps to reach a similar set of mysterious destinations.

The Results

Satellite navigation assisted journeys were around 7 percent shorter in towns than map-guided ones, and 2 percent shorter on rural runs.

The researchers attached sensors to each car to track how often a driver made a course correction. The research found that map users changed course more times during a journey than satellite navigation users.

One of the researchers offered an explanation for these positive results, saying that a satellite navigation unit relieves the drivers' mental workload: "Sat-nav users could take to the road immediately without any additional mental workload other than initially loading the destination into the device." By contrast map users have to study street maps before they enter the car "And their mental workload continues throughout the journey".