Situationality it concern the factors which make a text relevant to a situation of occurrence Situationality affect the means of cohesion if the road sign made explicit ,the driver may not find the time to road it and it may not grap his attention Intertextuality it concern the factors which make the utilization of one text dependent upon knowledge of one or more previously encountered text A driver who has seen road sign 1-is likely to see another sign further the road ,such as sign Every text would have an information structure a relevant situation and an intertextual extension.