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IRVEY has been carried out ig 497 lorry drivers to find vhy there are an increasing ber of lorries hitting low les.
e Transport and Road ReTh Laboratory says that 79 ;ent of drivers correctly unstood the road sign iroom at Hazard Ahead; 36 )rstood the Available Width aadroom at Hazard sign; 70 cent understood the lroom at Hazard ahead sign )njunction with a directional ; but only 31 per cent untood that the red circle sign cles Exceeding Height Indi d Prohibited was manda nety-five per cent of drivers ned to know the overall Fit of their vehicles, but in lice only 185 of the 497 drivwere accurate to within three as — 73 drivers underestied their height by more than e inches.
-ivers considered an infradetector system to be the ;t way to prevent high icles striking low bridges and use of gongs across the road he safe bridge height was Jght another satisfactory deant.