Remote Monitoring of Motorways Using Closed-Circuit Television

Publisher Website
Google Scholar
Abstract
Three 1-hour films of moving traffic on the M1 motorway were used to present synthetic closed-circuit television pictures. Twelve police officers from a traffic division and 84 civilians monitored one or three simultaneous films, looking for vehicles parked on the hard shoulders. Over 75 per cent of incidents at or nearer than 440 yards were reported, compared with under 45 per cent of incidents at or beyond 660 yards (p<0·01). Incidents at 220 yards were detected on average more rapidly than incidents at 440 yards (p<0·01). Observers monitoring a single film reported incidents at 220 yards reliably more rapidly (p<0·02) than observers monitoring three simultaneous displays. This in turn gave reliably quicker reporting (p<0·05 or better) of incidents at 440 yards than the other conditions in which three films were monitored but only one was visible at a time. The police officers were better at the task than the civilians. More detailed analyses suggested that in monitoring more than one film, looks should be long enough to detect distant incidents, but not so long that the reporting of near incidents on other films is unduly delayed. Civilians who monitored single films for 3 hours showed a slight improvement by the third hour

This publication has 5 references indexed in Scilit: