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#1 Tuesday 8th September 2009 21:09:32

hoylake
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From: Heysham
Registered: Friday 21st September 2007
Posts: 1,435
Website

at what point?

At what point have you overlapped brake and gear?

(a) when your hand is placed on the gearlever.

(b) when you move the lever.

thanks for replies.


http://www.sophiesdrivinglancaster.co.uk
Adi & Fleet Trainer, RoSPA Gold

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Tuesday 8th September 2009 21:09:32

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Re: at what point?



#2 Tuesday 8th September 2009 21:19:25

KevB
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From: Amesbury
Registered: Friday 6th June 2008
Posts: 1,725
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Re: at what point?

when you raise the clutch in the new gear whilst still braking would be my interpretation, as the gear isnt actually engaged until then.

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#3 Tuesday 8th September 2009 22:32:16

Kev D
Verified Member
From: Cheshire
Registered: Sunday 25th June 2006
Posts: 306

Re: at what point?

Its an interesting question and there will no doubt be a good variety of interpretations of what constitutes an overlap of brakes and gears.

When 'The Police System Of Car Control' was originally designed, one of its primary aims was to maintain vehicle stability at all times and this is where the brake gear overlap was introduced to "Advanced Driving".  A moving car is at its most stable when travelling in a straight line on a level surface at constant speed with gentle acceleration to keep the car moving at a constant speed.  When an additional force such as acceleration, brakes or steering is applied then the vehicle will essentially lose stability.  The extent to which the vehicle loses stability will depend on the initial speed and the amount of additional forces placed upon the vehicle.

For this reason the brake gear separation was introduced to Police high speed driving so that when braking from high speed, both hands would be on the steering wheel whilst the vehicle was in a reduced stability configuration and enable the driver to make any steering adjustments necessary under full control.  Once the desired lower speed has been achieved and the braking force released, the vehicle is now stable and at lower speed and the driver can now afford to remove one hand from the wheel to complete a gear change.  So in very simple terms from the Police perspective - when braking both hands must be on the steering wheel.

In terms of IAM or ROSPA testing, this standard may well not be so strictly adhered to and nor is it as critical at normal road speeds as it would be for higher speed driving.  Your IAM/ROSPA examiner may well indeed have their own particular quirks that they look for and this is where the "Meet The Examiner" evenings can be a crucial opportunity for you to ask your examiner anything you aren't sure of.

I hope this helps and wish you luck in your training!

Kev D
:police:


Police Driver Trainer
Grade 6 ADI - May 2013

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#4 Wednesday 9th September 2009 22:08:04

jonnmedds
Verified Member
From: Staffordshire
Registered: Wednesday 25th February 2004
Posts: 154

Re: at what point?

Totally agree with the great write up above.
Though when I did my RoSPA two years ago i'd never even heard of brake/gear overlap, I got a Gold neutral.
Brake gear overlap, well avoiding it was drummed into me on a one day course I attended with an Ex police driving instructor, and also when it's permitted.

Jon

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