One of the difficulties in road navigation systems, is that the driving situation tends to change quite often; when the conditions change because of road traffic conditions, this information tends already to be standardised and disseminated. These updates are often a combination of profesional information and user generated information through phone traffic hotlines. The smarter GPS navigation handsets suggest another route. Than comes the local conditions: local market every thursday, closed road because of works,... now this information can be uploaded and shard ith other users. The Mapshare solution from company TomTom for example is a great example of this 2,0way of making traffic information more relevant. Do you have another suggestion? Than post a reply on this blog.