Document ID: chunk:federal_register_of_legislation:F2023L01321:reg:30:p2
Version: federal_register_of_legislation:F2023L01321
Segment Type: reg
Provision Reference: reg 30 (pt 2/6)
Character Range: 59839–62641

truck:

       The second part shifts the synchronization by taking into account the impact position of the bicycle. It is given using the Impact Location L:

       The third part then takes into account the longer travel of the truck due to negotiating a constant radius turn towards the collision point rather than just going straight ahead as the bicycle does.

       The turn segment is approximated by a constant radius circle that ends as soon as the desired lateral displacement is achieved. Therefore db needs to be shifted by the difference distance between straight and turning.

 It can be calculated using the turn radius R, the lateral displacement Y=dlateral + 0.25 m (distance bicycle centreline to vehicle edge) and the impact location L.
       The final value for db is db,1 minus the other two parts db,2 and db,3:

       The value dc defines the last point of information. For vehicle speeds of 10 km/h and higher, it is the maximum of two values:

       the first value has been derived from physical test runs and characterizes at what distance from the collision point the heavy vehicle turn is started at the earliest and by turning towards the outside, the value is:

            15 m.

       The second value is the stopping distance, considering reaction time and the brake deceleration a, using the parameters deceleration and reaction time (5 m/s² and 1.4 seconds, respectively):

       Therefore, dc is defined by

       For vehicle speeds below 5 km/h, it is sufficient if the information signal is given at a distance corresponding to a TTC value of 1.4 seconds (similar to the static tests).

       Finally, dd is the first point of information. It can be calculated by adding the distance corresponding to 4 seconds of vehicle travel time to dc and correcting for the impact position in case the impact position is not 6 m:

       These formulas allow to completely populate Table 1 in Appendix 1 for test cases other than those defined there.

Annex 4

 Alternative Blind Spot Information Dynamic Test
           0.  Test concept and requirements for use (not legally binding)

           This alternative test procedure can be used to verify the conformity of the blind spot information system to paragraph 5.3.1.4. with regard to the activation timing as specified in paragraph 6.5.7. and 6.5.10., provided that the tests are performed with equipment that allows to control the position of both the vehicle under test and the bicycle dummy with an absolute accuracy of ± 0.5 m at all times. This equipment consists of a means to influence the vehicle movement, such as a driving robot system or a driving system that utilizes access to the vehicle's actuators, a robot-controlled platform for the bicycle dummy, and position measurement systems using a