Vinterväghållning och expertsystem: en kunskapsöversikt

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Magnus Ljungberg

The aim of the report is to clarify present knowledge in winter road maintenance and expert systems. On the basis of this, the possibilities of developing an expert system for winter road maintenance will be investigated.

The main areas studied are:

• Road climatology and road weather information systems

• Winter road maintenance methods

• Influence of winter road maintenance on the community and road users

• Expert system for winter road maintenance.

Even in an international perspective, Sweden has an advanced level of winter road maintenance. Together with Norway and Finland, Sweden is in the front line in several areas, primarily road weather information systems and chemical de-icing methods.

Development in mechanical de-icing has been slower, but in Sweden a number of interesting methods with better and longer influence than traditional methods have been developed in recent years. The new methods are Hottstone and Friction Maker.

Knowledge in snow clearance is poorer in Sweden than in Norway and the USA, among other countries.

The major shortcomings in knowledge concern the influence of individual winter road maintenance measures on road condition.

Very few scientific reports have studied the influence of salt dosage, durability of measures and the clearance capacity of snowploughs.

Today, there are no expert systems for winter road maintenance in the world, although there is a need for these. The reason is that such systems require an efficient road weather information system and in depth knowledge of winter road maintenance.

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