CATS Deliverable 2.3

CATS Deliverable 2.3: CATS Observation studies

van Dam, E.
op den Camp, O.M.G.C.
Uittenbogaard, J.
van Montfort, S.
de Hair-Buijssen, S.H.H.M.

2016

To support and prepare the introduction of Cyclist-AEB systems and the appropriate consumer tests of such systems, TNO has taken the initiative to set-up a project with passenger car manufacturers and suppliers and the support of Euro NCAP laboratories (such as BASt) to develop a testing system and test protocol for Cyclist-AEB systems: CATS, Cyclist-AEB Testing System. The objective of the second work package of the CATS project (WP2, "Test scenario definition") is to construct car-to-cyclist accident test scenarios for the EU, based on the accident scenarios and accident parameters mainly obtained from various EU countries. In [4], relevant accident parameters for the 5 most dominant accidents scenarios defined in WP1 are described. One of these parameters is a view-blocking obstruction in a near-side car-cyclist crossing scenario. Accident data, even not from the most detailed databases, usually does not describe behaviour of bicyclist (or cars) in their approach of an intersection. Since these behavioural parameters (e.g. speed reduction, pedalling behaviour) are important parameters when describing a test scenario, an observation study has been performed. This report describes the setup of such an observation study and the results of the study at 2 intersections with severe view-blocking obstruction in urban areas in the Netherlands. The velocity profiles of both cars and cyclists approaching the intersections were measured. Furthermore, for the cyclists, it was investigated what number of cyclists stops or continues pedalling when approaching the crossing, and in case they stopped pedal to determine the position of the legs (up-down or forward-rearward). The results show that all bicyclists reduce their speed, while some cars do not reduce speed at all near severe view blocking obstructions. More than 80% of the cyclist stopped pedalling when approaching the intersection. The majority of this group stopped pedalling with on leg up and the other leg down. Results about cyclist behaviour obtained in this study are used in the specification of the bicyclist target in WP3 [12].

TS - Technical Sciences
Mechanics, Materials and Structures
Traffic
IVS - Integrated Vehicle Safety

http://resolver.tudelft.nl/uuid:293512ac-fa59-4bb3-823c-56e4d7de2818

564748

TNO 2016 R10792

TNO, Helmond

report