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TMC; Technology vs Practicality

 
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PeterB
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Joined: 04/10/2002 16:38:07
Posts: 195

PostPosted: Sat Nov 27, 2004 9:31 am    Post subject: TMC; Technology vs Practicality Reply with quote

Question

I have been using 'TMC' in the guise of Route 66 'Dynamic Routing' for some months.
The basic technology works very well with regular downloads via SMS on a Nokia 6600 phone. i.e. the 'up to date' information with location of delay and approximate effect is always available, with regular updates.
However, the application of the data with automatic 're-routing' leaves a lot to be desired. On a recent 500 mile round trip via M25, M1 and M6 more than 10 diversions were recommended, which I ignored, and met with minimal delays in most cases.
The problem is that it is almost impossible to differentiate between a serious problem and a realistic diversion and a trivial problem with an inpractical diversion.
The technical problems seem to fall into 2 areas:-
a) The traffic information may NOT be timely or updated and the EFFECT in terms of delay not sufficiently precise.
b) The alogorythm for advising on a diversion may NOT be precise enough. What appears to be required is the comparison of the DELAY with the time required to take the diversion. Only if there is a clear time advantage in the diversion should it be recommended.
At the present stage of development it would appear important for the user to be advised with a summary of the actual delay, position and time, plus an indication of the extra time involved with a diversion. The user should then have a choice as to continuing as planned or changing!!!

Currently I have decided NOT to use the 'Dynamic routing' feature until some changes result in greater user confidence!!

I would be very interested in other users practical experience of the use of any of the traffic information systems!
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