The A13
The A13 carries 0.74 times the national average rate of motorcyclist killed-or-seriously-injured casualties, per mile ridden — measurably below average.
Figures for the A13
Rate
1,595
motorcyclist KSI per billion vehicle miles, over 0.082bn miles ridden
95% interval
1,334 to 1,893
national average 2,170
Compared with the national average
0.74x
the whole interval sits below it
Killed or seriously injured
131
2021-2025, of which 4 killed
Exposure
0.082bn
motorcycle vehicle miles ridden on this road over the five years
All casualties
486
all severities, motorcyclists
Count against rate
Britain's danger rankings usually count casualties, which rewards long, busy roads. The A13 is 9th by count of 1,710 ranked roads, and 1,191th by rate — below average once the 0.082 billion miles ridden on it are taken into account. See the full ranking.
The A13 on the map
The road as mapped, with the motorcycle collisions recorded on it between 2021 and 2025.
Loading map
Cyclists
Method and source
Motorcyclist casualties on this road from DfT STATS19, 2021-2025, divided by motorcycle traffic on the same road from the DfT annual average daily flow counts. KSI means killed or seriously injured. The interval is the 95% confidence interval on the rate; a rate is never shown without the miles it was divided by. We publish a page for a road only where that interval clears the national average of 2,170 KSI per billion vehicle miles, so roads that cannot be told apart from average have no page.
DfT STATS19 casualty and collision files 2021-2025, and DfT AADF traffic counts 2021-2025, both under the Open Government Licence v3.0
Contains public sector information licensed under the Open Government Licence v3.0.