Justin, FYI the traffic survey gathered lots of data about speed and vehicle volumes.Between 7am and 7pm, from the ANPR cameras on Staveley Rd, there were over 3000 cars, 600 vans, 157 buses, 37 medium goods vehicles and 2 HGVs. The ANPR cameras don't pick up powered two wheelers. My guess is that as these were temporary cameras for a survey, they may not be as capable as permanent cameras. Automatic Traffic Counters (tubes on the roadway) measure speed and infer the type of vehicle but the data provided doesn't separate out speed for each type of vehicle and they also don't distinguish between bikes and powered two wheelers.Bikes and powered two wheelers made up 3.6% of the traffic on Staveley Rd.For Staveley Rd, the speed profile was:under 20mph: 26% of vehicles20-25mph: 44% of vehicles25-30mph: 23% of vehicles30-35mph: 5% of vehicles35-40mph 1% of vehicles>40mph: < 1% of vehicles<1% will still be tens of vehicles every day.Traffic engineers use a figure called the 85th percentile to assess the "de facto" speed limit of a road. This is the speed below which 85% of vehicles travel and for Staveley it is 28mph. Or put another way, on average 3 out of every 20 vehicles exceed this speed.
Michael Robinson ● 2281d