Re: [SystemSafety] Small but useful Detail on Road Stopping Distances

From: Peter Bernard Ladkin < >
Date: Wed, 29 Jul 2015 15:58:35 +0200

Hash: SHA256

On 2015-07-29 15:31 , Mike Ellims wrote:
> A 9m reaction distance at 30 kph is around a 1.1 second reaction time which looking at the
> literature is faster than "normal" reaction times to events such as brake lights.

The traffic law in Germany stipulates a reaction time of 1 second. It may seem odd to stipulate something like this, but there have to be engineering values used for calculating whether a particular traffic instruction/information measure is appropriate for speeds and locations.

In commercial aviation, a reaction time of 1.5-2 seconds is generally seen/used.

PBL Prof. Peter Bernard Ladkin, Faculty of Technology, University of Bielefeld, 33594 Bielefeld, Germany Je suis Charlie
Tel+msg +49 (0)521 880 7319

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systemsafety_at_xxxxxx Received on Wed Jul 29 2015 - 15:58:43 CEST

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