On the basis of all data concerning accidents and traffic on the Venice-Padova toll motorway, collected over a period of ten years (1988-1998), it has been possible to quantify the consequences bred on safety by the introduction (1992) of the third lane and a traffic control system. The proposed paper is aimed at resuming some fundamental effects on road safety bred by the carriageway enlargement and by the availability of the telematic system: in particular their relationships with the primary accidents, the secondary ones (i.e. those consequent to the primary ones) and with accident rate (accidents divided by 10 power 8 vehicle-km) have been evaluated. The following diagnosis is limited to the major aspects of a specific toll motorway, where the first complete traffic control system in Italy has been installed, but it can be used to derive some guidelines for an overall judgement about telematics effects on road safety.
Samenvatting