A large part of the problem is the way CAS data is gathered. A lot of it comes from Police Traffic Crash Reports, filled in by people who don't bother checking the accuracy of the data they are gathering.
TCRs have several purposes. They inform insurance companies, they generate information through CAS, they are a court document in the case of prosecution, they are disclosed as Official Information as required. A lot of which leads to inaccuracy.
In particular, a lot of data gatherers don't know the difference between a cycle, a power assisted pedal cycle, a moped, and a motorcycle.
The other issue is that the data gatherer often has 10 other jobs to do, so jjust fills in what has to be done to get it past his/her supervisor, so they can go and do the other 10 jobs. Haste diminishes accuracy.
Just sayin. Garbage in equals garbage out.
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