Lane change driver reaction times

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Presentation transcript:

Lane change driver reaction times Informal Document: ACSF-15-17 Lane change driver reaction times Industry input to ACSF IG 15th meeting November 2017, Bonn

Intention of the Investigation During lane change there are two important facts to consider in terms of timing. Reaction time (duration) Literature is available Start point of the reaction time Investigation to find out when this reaction time starts

Cover story for the test - Active Steering assistant The investigation consists of three phases (for the test person*) Set-up phase : become familiar with the operation of the system/ car / environment and, in particular, to get used to drive on the target speed of 130 km / h. natural driving behavior, is to be recorded as a reference different variants of a system for guidance will be tested. Boundary conditions: If the rest of traffic permits, drive on the straight sections on the left lane. If permissible, accelerate speedily to 130 km / h on the straight sections and keep this speed as good as possible. Please drive as you usually do in traffic. *The test persons were selected through our driving simulator test management

Test procedure The investigation consists of two phases Set-up phase : become familiar with the operation of the system/ car / environment and, in particular, to get used to drive on the target speed of 130 km / h. Test of (reaction time) the start point of reaction After the test the test persons were asked if the cover story was plausible. All test persons stated that they believed in the cover story.

Setup Test car at 130 kph, rabbit at 80 kph - dv=50 kph (13,8 m/s) Test manager triggers the rabbit at approximately 96m (hidden trigger) Rabbit activate the direction indicator Rabbit drifts to the lane After 3 seconds rabbit crosses the line (distance TC and rabbit  55m) Test car Test person Test manager Rabbit

Proving Ground in Sindelfingen

Instruction for the test manager Drive 5 to 6 laps to get used to After the acclimatization phase “ Now we start with the second part, we want to record the natural driving behavior as a reference. Please drive as you usally do on the road.” The rabbit must be overtaken twice by the test car. In a suitable situation, set the lane change trigger by radio (walkie talkie). After lane change Trigger the measurement equipment Test person ask to remember the behavior in this lane change situation Fill test protocol Move back to the parking position on the proving ground Interview Questions Good bye

Test results TC - Test car DI - Direction indicator

Interview after the test

BACKUP

Cover story for the test - Active Steering assistant The test consists of three phases We start with a set-up phase over a few laps, during which you first become familiar with the operation of the system and, in particular, get used to drive on the target speed of 130 km / h. During this phase you drive without the assistance of driver assistance systems. In the second part, the natural driving behavior with regard to the lane keeping is to be recorded as a reference. In addition, following the acclimatization phase, you will again drive a few laps without the assistance of driver assistance systems. Finally, in the third part you will experience different variants of a system for guidance. This is especially to assess the stability of the line keeping. Please rate in this part naturalness and comfort of the system. Please say immediately if you notice any commuting, leaving the center of the lane, or other effects, and how they affect you, how strongly you perceive them and whether you feel impaired by them. While driving, please consider the following rules: The rules and maximum speeds of the proving ground always apply. If the rest of traffic permits, drive on the straight sections on the left lane. If permissible, accelerate speedily to 130 km / h on the straight sections and keep this speed as good as possible. Please drive as you usually do in traffic. Note in particular that other vehicles may be traveling at the same time on the proving ground. Safety comes first: As soon as you feel unwell, please inform your test administration immediately. Please DO NOT use the DISTRONIC until explicitly requested to do so.

Interview after the test

Test persons The test persons were selected by the driving simulator test management. The test persons are all Daimler employees, because they need acces to the proving ground. None of them is working in driver assistance systems.