ABSTRACT
Information from different sources should match to ensure that the same message is communicated to the road user. Contradictory or conflicting information or information other than expected may cause distraction, confusion, longer reaction times etc. Consistency in the design and application of uniform information may help drivers to better predict what is expected and so anticipate what is coming instead of being surprised at the wrong moment. Easy recognition of information relevant for route choice requires consistent and uniform application of route information dependent on the type of road one is driving on. In-car navigation systems have become more and more popular and definitely fulfil users' needs. It is very important that the information the in-car system is providing matches the information shown along the road on traditional route signs with respect to distance, directional choice, destinations and lane choice.
