This study was designed to investigate the comprehensibility of messages selected to be used in Radio Data System - Traffic Message Channel (RDS-TMC) service. Sixty licensed drivers were interviewed. The interview consisted of three parts. The first part was a comprehension test, followed by a preference test. The last part of the interview was about finding out how long drivers expect to wait when they hear about a traffic event that may cause delays in traffic. The main results showed that people on roadway was understood better than pedestrians on roadway as indicating events involving unexpected pedestrians in any part of the roadway. The phrase expected was understood as more certain than danger of or possible. Traffic and traveller information often consists of information on a cause and a consequence. These two parts of the message can be provided in two orders. The interviewed drivers preferred the order in which the cause is followed by the consequence. (A*)
Samenvatting