文档介绍：Unit3
Introduction
       Transport telematics, also known as intelligent transport systems (ITS), are concerned with the application of electronic information and control to improve transport. Some new systems have already been implemented and the pace of implementation can be expected to quicken. With a crystal ball, we can foresee how a typical journey to work may look in 10 years time.
       Before leaving home, you check your travel arrangements over tile . Often you choose to travel by public transport and you can identify travel times and any interruptions affecting the service. On this occasion, you choose to travel by car as you have an appointment later in the day at one of those oldfashioned business parks that are essible by public transport. There are no incidents recorded on your normal route to work so you do not bother to use puter route model to select an optimum route for you.
       Once in your car, you head for the motorway and select the cruise control, lane support and collision avoidance system, allowing you to concentrate on your favorite radio service. Suddenly, this is intelrupted by the radio traffic-message channel service giving you information about an incident on your route. You are not surprised when, at the next junction, the roadside variable message sign (VMS) corffirms this; motorway messages really are believable now!
       You feel pleased with yourself that you have preceded your in-car navigation system with the coordinates of your final destination, and soon you are obtaining instructions on your best route with information updated from the local travel control center.
       As you near your place of work, you are aware of roadside messages informing you of the next park and ride service. You choose to ignore these as you will need to make a quick getaway for your appointment. You then check that your travel card is clearly displayed inside the car; you don't want to be fined for not having a positive credit for th