Friday, June 19, 2009

Government rules out public inquiry into Potters Bar and Grayrigg rail disasters

The Government today ruled out a public inquiry into two separate train disasters which claimed the lives of eight people.

Transport Secretary Lord Adonis instead said the public interest was 'best served' by holding two independent inquests into the 2002 Potters Bar and 2007 Grayrigg disasters.The decision will anger relatives of the victims and rail unions who have called for a joint public inquiry into the crashes, which were caused by faulty sets of points.

Lord Adonis said today: 'I have decided that the public interest is best served by the continuation of the two inquests that have begun into the deaths resulting from the rail accidents at Potters Bar and at Grayrigg.'I have therefore decided not to convene a public inquiry into the accidents, either individually or jointly.'

He said he regreted the length of time taken to reach this decision as well as the anxiety it may have caused to relatives.'However, the chronology of events and the issues are complex and I considered it important to ensure that my decision regarding the next steps is the right one, he said.

'Having considered the material before me, I am satisfied that separate inquests will allow for appropriate further independent investigations of the accidents, with the bereaved and injured able to participate and express their views and concerns in a transparent forum open to public scrutiny.'Although the conduct of the inquests is a matter for the coroners, the inquests will be capable of examining the relevant issues raised by the accidents, including those that are common to both.'

But Keith Norman, leader of the train drivers union Aslef said it was astonishing that the Government is not prepared to give the maximum transparency to what happened.The May 2002 Potters Bar accident happened when a West Anglia Great Northern high-speed train travelling from London to King's Lynn in Norfolk was derailed as it went over faulty points just outside Potters Bar station in Hertfordshire.

Six passengers died and an elderly woman pedestrian was killed when debris fell on to the road beneath the track. In addition, 76 people were injured.

That section of track was being maintained by private company Jarvis while overall responsibility for safety of the railways lay with Railtrack, the private rail infrastructure company later replaced by Network Rail (NR).

An accident report by the Health and Safety Executive in May 2003 blamed poor maintenance for the points failure, with earlier inspections not spotting defects in the points.In April 2004, NR and Jarvis formally accepted liability on behalf of the rail industry for all legally justified claims brought by the bereaved and injured in respect of the crash.

In October 2005, the Crown Prosecution Service said it had advised British Transport Police that there was no realistic prospect of conviction for an offence of gross negligence manslaughter against any individual or corporation in respect of the Potters Bar accident.

The February 2007 Grayrigg accident in Cumbria happened on the West Coast Main Line when a Virgin Rail Pendolino high-speed 'tilting' train travelling from London to Glasgow passed over a faulty set of points at 95mph.

Although only one person died, nearly 90 were injured when a number of coaches were derailed.NR immediately accepted blame for the accident and in a report last October, the RAIB listed a catalogue of safety errors.These included the non-carrying out of a planned inspection that 'should have detected' the faulty points.

Lord Adonis said today that as far as Grayrigg was concerned there would be 'a further independent examination of the accident during an inquest, which I am satisfied is capable of addressing any relevant questions that remain unanswered'.

He added that he would 'make funds available to the Coroner for South and East Cumbria, to assist him in carrying out a full investigation, if these are requested'.

The Potters Bar inquest was adjourned after the Grayrigg accident.Lord Adonis said reopening of the Potters Bar inquest would 'provide an opportunity for a further independent examination of the accident.

Writer Nina Bawden, 84, whose husband Austen Kark was killed in the Potters Bar crash, said families have worked hard for a public inquiry and are disappointed one won't be taking place.

'The Government could have had the decency of informing us first about today's news,' she said.Ms Bawden, who was badly injured in the May 2002 accident, added: 'The reopening of the Potters Bar inquest is at least something. I hope everything will come out.

'I want them to come to a sensible conclusion and make the railways as safe as possible.'But Gerry Doherty, leader of the TSSA rail union dismissed the claim and said it was yet another example of the Government doing the complete opposite of what it claims to be doing.

'Just like alleged transparency over MPs' expenses, these inquests are part of the ongoing cover-up over the Potters Bar tragedy in particular,' he said.'They wait seven years and then announce an inquest which will not report before the next election - just like their alleged inquiry into the Iraq War.'

'If they were really interested in letting the public know what happened at Potters Bar - and the role that private contractors Jarvis played in that accident - they would have ordered a full public inquiry into the tragedy years ago.'

Bob Crow, general secretary of the RMT rail union, said the inquest announcement was welcome but not an alternative to a full public inquiry.There is a real danger of another Hatfield (the 2000 rail crash in which four people were killed), Potters Bar or Grayrigg and the Government should intervene to reinstate the full renewals programme before we have another disaster on our hands,' he said.

Monday, May 25, 2009

High Speed Train an International Transport Revolution


In Our highways are clogged with traffic. Our airports are choked with increased loads. We are at the mercy of fluctuating oil prices. We pump too many greenhouse gases into the air. What we need is a smart transportation system equal to the needs of the 21st century. A system that reduces travel times and increases mobility. A system that reduces destructive emissions and creates jobs. What we're talking about is a vision for high-speed rail.

Japan

At the entrance to Tokyo Central Station is a plaque which declares the Shinkansen “Product of the wisdom and effort of the Japanese people.” “As an indication of the unity of purpose and of the pride which the Japanese people feel for this achievement, this inscription …. Can hardly be bettered”, writes Rod Smith of Imperial College in his excellent history of the Shinkansen.

Japan’s first railways had been built, to a narrower gauge than ours, by a British engineer in the 1870s. The line from Tokyo to Nagoya and Osaka is the country’s principal 350 mile rail artery, accounting in the 1950s for a quarter of the country’s rail traffic although only three per cent of the rail system by length. It was electrified in 1956, enhancing capacity and reducing the journey time to six and a half hours.

This is where Japanese railway modernization might well have stopped for a generation – as it did, at electrification of principal inter-city lines, in most of Europe at the time. What happens generally seems pre-ordained after the event, and so it is both with Japan’s decision to develop the bullet train and our decision not to. Yet this is quite unhistorical, as Rod Smith explains. On the contrary, the phrase “railway downfall theory” was in vogue in 1950s Japan: the view that rail was an outdated technology which was set to follow horse carriages, canals and sailing ships, to be replaced by faster planes for the longest distances and by the far more flexible and individualistic car and truck for shorter distances.

This view was indeed widely held within Japanese National Railways itself. It was only the vision and leadership of a small group of talented managers and engineers, led by its president and chief engineer, which ordained otherwise. They essentially sidestepped projections about long-term rail decline, concentrating rather on the immediate capacity requirements of the densely populated and economically critical Tokyo to Osaka corridor, convincing the government that a patch-and-mend upgrade to the existing line was too cautious for this key route. This capacity argument, plus the availability of a low interest World Bank loan – jobs and regeneration being a good part of the case for high-speed rail, as for motorways, from the outset – led to the decision to construct a new passenger-only line for this route alone, to the standard international gauge, free from level crossings, with shallow curves and in-cab signalling allowing a consistently high line speed.

Tuesday, May 12, 2009

Cruising (Driving skills)

Cruising is a social activity that primarily consists of driving a car. Cruising can be an expression of the perceived freedom of possessing a driver's license. Cruising is distinguished from regular driving by the social and recreational nature of the activity, which characterized by an impulsively random, often aimless course. A popular route (or "strip") is often the focus of cruising. "Cruise nights" are evenings during which cars drive slowly, bumper-to-bumper, through small towns.

Driving is the controlled operation of a land vehicle, such as a car, truck or bus. Although direct operation of a bicycle, a mounted animal (not including chariot operation) or a motorcycle (at least in the United Kingdom, the United States, Canada and Australia) is commonly called riding, such operators are usually legally considered to be drivers and are required to obey the rules of the road which apply to all drivers.Driving in traffic is more than just knowing how to operate the mechanisms which control the vehicle; it requires knowing how to apply the rules of the road (which govern safe and efficient sharing with other users). An effective driver also has an intuitive understanding of the basics of vehicle handling.

Driving as a physical skill :

In terms of the basic physical tasks required, a driver must be able to control direction, acceleration, and deceleration. For motor vehicles, the detailed tasks include . Starting the vehicle's engine with the starting system ,Setting the transmission to the correct gear ,Depressing the pedals with one's feet to accelerate, slow, and stop the vehicle, and if the vehicle is equipped with a manual transmission, to modulate the clutch ,Steering the vehicle's direction with the steering wheel ,Operating other important ancillary devices such as the indicators, headlights, and windshield wipers

Monday, May 04, 2009

Electric charge-electromagnetic fields


Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields. The interaction between a moving charge and an electromagnetic field is the source of the electromagnetic force, which is one of the four fundamental forces.

Electric charge is a characteristic of some subatomic particles. It is quantized: when expressed in units of the so-called elementary charge e, it takes integer or fractional values. Electrons by convention have a charge of −1, while protons have the opposite charge of +1. Quarks have a fractional charge of −1⁄3 or +2⁄3. The antiparticle equivalents of these (positrons, antiprotons, and antiquarks, respectively) have the opposite charge. There are other charged particles. The discrete nature of electric charge was proposed by Michael Faraday in his electrolysis experiments, and then directly demonstrated by Robert Millikan in his oil-drop experiment.

In general, same-sign charged particles repel one another, while different-sign charged particles attract. This is expressed quantitatively in Coulomb's law, which states that the magnitude of the electrostatic repelling force between two particles is proportional to the product of their charges and the inverse square of the distance between them.

The electric charge of a macroscopic object is the sum of the electric charges of its constituent particles. Often, the net electric charge is zero, because it is favorable for the number of electrons in every atom to equal the number of protons (or, more generally, for the number of anions, or negatively charged atoms, in every molecule to equal the number of cations, or positively charged atoms). When the net electric charge is non-zero and motionless, one has the phenomenon known as static electricity. Even when the net charge is zero, it can be distributed non-uniformly (e.g., due to an external electric field, or due to molecular motion), in which case the material is said to be polarized. The charge due to the polarization is known as bound charge, while the excess charge brought from outside is called free charge. The motion of charged particles (e.g., of electrons in metals) in a particular direction is known as electric current.

Thursday, April 16, 2009

Breaking Power/Stopping Distances

Average Dry Stopping Distance (Assuming two-thirds of a second reaction time)
Speed Thinking Distance Braking Distance Total Stopping Distance
20 mph 20 feet 20 feet 40 feet
30 mph 30 feet 45 feet 75 feet
40 mph 40 feet 80 feet 120 feet
50 mph 50 feet 125 feet 175 feet
60 mph 60 feet 180 feet 240 feet
70 mph 70 feet 245 feet 315 feet
80 mph 80 feet 320 feet 400 feet
Average Wet Stopping Distance (Assuming two-thirds of a second reaction time)
Speed Thinking Distance Braking Distance Total Stopping Distance
20 mph 20 feet 40 feet 60 feet
30 mph 30 feet 90 feet 120 feet
40 mph 40 feet 160 feet 200 feet
50 mph 50 feet 250 feet 300 feet
60 mph 60 feet 360 feet 420 feet
70 mph 70 feet 490 feet 560 feet
80 mph 80 feet 640 feet 720 feet

Tuesday, April 07, 2009

Traffic Signals-Universal Color Code


A traffic light, traffic signal or a stop light is a signaling device positioned at a road intersection to indicate when it is safe to wade through. The traffic signal passes on its information using a universal color code .

Traffic signs or road signs are signs erected at the side of roads to provide information to road users. With increasing speed of transport, the tendency is for countries to adopt pictorial signs or otherwise simplify and standardize signs, to facilitate international travel where language differences can create barriers and in general to reduce the risks in driving. Such pictorial signs use symbols in place of words and are usually a result of international standards.

Tuesday, March 31, 2009

Road Rules-set of clues and a mission


Road Rules, MTV's second reality show, debuted on July 19, 1995. The series followed six strangers between the ages of 18 and 24 (five strangers in the first four seasons) after stripping them of their money and putting them on an RV traveling from location to location only guided by a set of clues and a mission to complete at each location. It was nominated for an Emmy Award in 2001.

There was also a 1998 mini-series, Road Rules: The Real World All-Stars, in which five former stars from The Real World go on a short Road Rules course managed by infamous former Real World housemate Puck, who, until the very end of the series, was disguising h
is identity with the alias "Mr. Big". However, this is generally considered the first season of Real World/Road Rules Challenge.

Monday, March 30, 2009

Tuesday, March 24, 2009

Road safety - public health and injury prevention

Road safety aims to reduce the harm (deaths, injuries, and property damage) resulting from crashes of road vehicles. Harm from road traffic crashes is greater than that from all other transportation modes (air, sea, space, off-terrain, etc.) combined.

Road safety deals exclusively with road traffic crashes – how to reduce their number and their consequences. A road traffic crash is an event involving a road vehicle that results in harm. For reasons of clear data collection, only harm involving a road vehicle is included. A person tripping with fatal consequences on a public road is not included as a road-traffic fatality. To be counted a pedestrian fatality, the victim must be struck by a road vehicle.

Road traffic crashes are one of the world’s largest public health and injury prevention problems. The problem is all the more acute because the victims are overwhelmingly healthy prior to their crashes. According to the World Health Organization more than a million people are killed on the world’s roads each year.

Tuesday, March 17, 2009

Driving skills

Driving in traffic is more than just knowing how to operate the mechanisms which control the vehicle; it requires knowing how to apply the rules of the road (which govern safe and efficient sharing with other users). An effective driver also has an intuitive understanding of the basics of vehicle handling.

In terms of the basic physical tasks required, a driver must be able to control direction, acceleration, and deceleration. For motor vehicles, the detailed tasks include:

* Starting the vehicle's engine with the starting system
* Setting the transmission to the correct gear
* Depressing the pedals with one's feet to accelerate, slow, and stop the vehicle, and if the vehicle is equipped with a manual transmission, to modulate the clutch
* Steering the vehicle's direction with the steering wheel
* Operating other important ancillary devices such as the indicators, headlights, and windshield wipers