FOR thousands of years travellers have looked to the stars for guidance on their journeys. Today even short trips involve contact with the skies as in-car receivers communicate with satellites.
You may already have an on-board satellite navigation system (sat nav). Perhaps it is a dedicated device such as those made by Navman and TomTom, or it may be displayed on the screen of your mobile phone or handheld computer. Mobile phones with built-in sat nav receivers have become more popular and some motor manufacturers have begun to incorporate sat nav systems into dashboards.
A sat nav device works by receiving signals from several satellites simultaneously and using these signals to fix a position at a single point in time. This position can then be represented on a digital map. It can also be sent to a control centre to inform others of where you are.
Currently most sat nav receivers use a system called GPS (global positioning system) based on the constellation of US military satellites. A civilian system, called Galileo, which has been developed by the European Union and the European Space Agency, aims to add 30 satellites over the next five years. The first test satellite has already been launched.
Although the project is in danger of stalling over a funding dispute, if all goes to plan once Galileo is in operation, sat nav systems will potentially be more accurate. Your position will be determined down to about one metre – currently positioning can vary up to ten metres. More importantly for drivers following a route, the signal will not be lost as you drive under trees or between tall buildings, as can happen nowadays.
However any improvements for a driver will be more to do with whether the digital maps in the sat nav are up-to-date and the technology that sets the route is good enough. Problems associated with sat nav today are often down to failures in these areas rather than interrupted satellite signals.
When integrated with other services such as real-time traffic information, the sat nav will choose the best route, which may not necessarily be the shortest route by distance. Your sat nav will cleverly guide you away from congested areas, roadworks, traffic hazards and blackspots.
“Current systems are rather limited in that they know the road network but not the road conditions,” says Dr. Paul Firmin of the Institute for Transport Studies at Leeds University. “Combining network data with current traffic information is the next big growth area for in-car sat nav systems and it is not very far away from being a market reality.”
More and more information is being integrated into sat nav services. “We are collecting data on speed limits, height and width restrictions, time of day restrictions plus the locations of hundreds of points of interests,” says Peter Beaumont, a Marketing Director at NAVTEQ, which supplies geographical data on the road network to a number of the sat nav service providers.
Government agencies, companies and transport organisations may use advances in technology and data gathering to develop new and improved services. For example, if you break down on the road your position and even the problem with your vehicle could be diagnosed and transmitted automatically to the breakdown service. Similarly, when there has been a traffic accident the emergency and recovery services can respond much quicker if they know instantly where it occurred.
If your vehicle is stolen then, with the right kind of on-board technology, the police could track it in real-time. It may also be possible for them to cut off the engine and seal the doors!
Of course, the speed and extent to which many of these future scenarios become reality will depend on society allowing aspects of privacy to be invaded.
For the private hire sector there are also great opportunities. Satellite navigation can bring a fare and a driver together much more efficiently as Dr. Firmin explains: “Someone on a night out in need of a cab can use his or her mobile to send a signal to the car firm which will know exactly where the caller is, without speaking to them. Instantaneously, another message is then sent to the nearest available driver, again without a conversation taking place, telling them to pick up the fare and where it is. This is great for improving the efficiency and response time of private hire car services.”
What you see on your sat nav device or mobile phone screen is set to change too as the technology gets better. A number of companies have developed digital maps showing buildings and hills for a more realistic driver experience. Eventually you may even see photography, choosing from a number of viewpoints such as aerial, birds-eye and through the windscreen.
As with many technologies, consumers may become more demanding and there will be pressure to provide additional features. However, there are dangers as more sophisticated sat nav devices could lead to driver distraction, something the Department for Transport is taking seriously.
Satellites do not actually track vehicles but when in-car sat nav receivers send signals to collection points the potential for control of drivers routes is possible. If enough vehicles send data to the same control centres, the transport authorities or companies, for example, will be able monitor traffic flows in city centres and re-route drivers accordingly, although this raises privacy issues.
For private hire drivers there is obvious value in your control centre monitoring where you are and directing you and your passenger away from trouble spots, but you may not want to have your position known to the local authority or central government.
Transport authorities could use the technology to introduce more sophisticated congestion charging schemes and even road pricing. Drivers could be charged by the second when their vehicles are in traffic hotspots or even instructed not to enter them at all at the risk of a penalty. Road-pricing could mean an end to road tax and perhaps even fuel duties.
Your maximum speed and your distance from other road users could even be controlled using satellite navigation and other in-car or roadside technology.
Dr. Firmin is in no doubt as to how dramatic future developments will be: “Satellite navigation technology will have as big an impact as the mobile phone and the internet,” he claims.
A European Union funded project has already looked into how future technologies could enable driverless vehicles.
The project was called Stardust perhaps because it seems like science fiction, but you have been warned!