Statistical Bulletin Trn/2005/2
Scottish Household Survey Travel Diary results for 2003
8. Car journeys: delays due to traffic congestion ( Table 11; Chart I)
8.1 Table 11 provides estimates of delays attributed to congestion on the roads, as reported by the drivers of cars. With effect from April 2003, for each car journey made, the interviewer asked "was this part of your trip delayed due to traffic congestion?" and, for those who said that it was, the interviewer asked "how much time do you think was lost due to traffic congestion?" No definition of "traffic congestion" was provided, so the respondents could interpret the term as they wished. Approximately 11% of journeys made as the driver of a car were said to be delayed due to traffic congestion. 4% of car drivers' journeys were delayed by about 5 minutes, 3% by about 10 minutes and 3% by about 15 minutes or longer.
8.2 24% of car drivers' journeys which started between 8:00 and 8:59 a.m. on a weekday reportedly suffered delays due to congestion, as did 19-21% of such journeys started between 7:00 and 7:59 a.m. and between 4:00 and 5:59 p.m. At weekends, only 6-7% of car drivers' journeys suffered delays due to congestion. Traffic congestion delayed only 2-3% of car drivers' journeys made by people residing in "remote" small towns and "remote" rural areas, compared to 14% of journeys by drivers living in large urban areas.
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