Police Speed Guns

TooManyPoints

Lancashire police have recently allowed 1mph more, they now prosecute at 10% + 3mph. Just my luck to have been caught 2 weeks previous to this at 35mph.

Thanks for that info. I wasn't aware of any force routinely departing from the NPCC's guidelines.

SHAFT

TooManyPoints wrote: »

Thanks for that info. I wasn't aware of any force routinely departing from the NPCC's guidelines.

And why would you be aware?

Car_54

z1a wrote: »

Lancashire police have recently allowed 1mph more, they now prosecute at 10% + 3mph.

Do you have a source for that?

TooManyPoints

And why would you be aware?

I've said, I wasn't. I only know that none of the forces of which I do have knowledge have not (as far as I know). The Chief Constable of Lancashire must have left me off his list when he circulated the revised policy.:rotfl:

z1a

Car_54 wrote: »

Do you have a source for that?

Local paper, - Lancashire Telegraph. On 5th July this year.

Joe_Horner

SHAFT wrote: »

Unless you work somewhere that either produces NIP's or in a large fleet office you won't have. Just saying you have just puts you in the same category as the pepipoo armchair lawyers.

Oh, the irony!

Car_54

z1a wrote: »

Local paper, - Lancashire Telegraph. On 5th July this year.

I’ve read that report, which is very confused. They talk of a “buffer zone” of 10% + 3, compared to +2 elsewhere, which (if true) means action in Lancs starts at 10% + 4.

The reality is that generally action starts at 10% + 2, so the “buffer zone” is 10% + 1. It’s anyone’s guess what’s really going on in Lancashire.

z1a

Car_54 wrote: »

I’ve read that report, which is very confused. They talk of a “buffer zone” of 10% + 3, compared to +2 elsewhere, which (if true) means action in Lancs starts at 10% + 4.

The reality is that generally action starts at 10% + 2, so the “buffer zone” is 10% + 1. It’s anyone’s guess what’s really going on in Lancashire.

I did a SAC for my crime 2 weeks ago, even person running course knew about Lancashires new tolerance, and they commented that a week later I'd have been OK.

TooManyPoints

I've found this:

https://www.lancashire.police.uk/faqs/speeding/can-i-have-a-caution/

which seems to confirm that Lancashire police begin enforcement at 10% + 3mph.

Hope this helps.

Ergates

AdrianC wrote: »

And the chances of a pedestrian hit at 30 being killed are *significantly* higher than those of a pedestrian who isn't hit, because everybody was actually paying attention to what they were meant to be doing.

Obviously, not being hit by a car at all is less serious than actually being hit by a car. What's your point?

My point is that due to a confluence of the physical properties of the human body and the physics of energy transference - an increase in speed from 30-40 represents some kind of "sweet spot"* for mortality with pedestrians.

https://nacto.org/docs/usdg/relationship_between_speed_risk_fatal_injury_pedestrians_and_car_occupants_richards.pdf

Although the absolute values of risk differ between the three datasets, the increase in
fatality risk with impact speed follows a similar pattern in all three. There is a
gradual rise of risk up to impact speeds of around 30 mph. Above 30 mph the risk of
fatality increases more rapidly with respect to speed:
• in the Ashton and Mackay dataset, the risk increases 5.5 times from 30 to
40 mph;
• in the OTS and police fatal file dataset, the risk increases 4.5 times from 30 to
40 mph; and
• in the Rose´n and Sander dataset, the risk increases 3.5 times.

i.e. a 30% increase in speed doesn't represent a 30% increase in danger to pedestrians.

* Obviously, sweet spot isn't really the appropriate word here - sour spot?