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Study on TTC Distribution when Approaching a Lead Vehicle
Technical Paper
2016-01-1452
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In order to help avoid or mitigate rear-end collisions a Pre-Collision System (PCS) was developed. The purpose of this study is to clarify the Time-to-Collision (TTC) distribution when approaching a lead vehicle under normal driving condition. To enhance the effectiveness of PCS, warnings and/or automatic brake activation should happen as early as possible, however, if too early there is a high possibility of false warnings or activations, which is not desirable. If the distribution of distance to a lead vehicle under normal driving conditions is quantified, an approach limit can be estimated. In this study, we try to clarify a TTC distribution that is approximated by a log-normal distribution. Then, we investigate the Enhanced Time-to-Collision (ETTC) that is the secondary predictive value of TTC. And, we clarify the log-normal distribution of ETTC is a more stable approximator of normal driving than a log-normal distribution of TTC.
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Murata, E., Usui, T., Nogi, K., and Takahashi, H., "Study on TTC Distribution when Approaching a Lead Vehicle," SAE Technical Paper 2016-01-1452, 2016, https://doi.org/10.4271/2016-01-1452.Also In
References
- Traffic Accident Situation in 2014 Traffic Bureau, National Police Agency
- Kondoh , T. et al. Identification of Visual Cues and Quantification of Drivers' Perception of Proximity Risk to the Lead Vehicle in Car-Following Situations J. Mech. Sys. Transportation and Logistics 1 2 170 180 2008
- Wada , T. et al. Characterization of Expert Drivers' Last-Second Braking and Its Application to a Collision Avoidance System IEEE Trans. ITS 11 2 413 422 2010
- Aoki , H. et al. Perceptual risk estimate (PRE): an index of the longitudinal risk estimate The 22nd ESV Conference 2011
- Tamura Y. et al. Time Headway Distribution Model Based on the Composition of Free and Constrained Following Vehicles Proceedings of the Japan Society of Civil Engineers 336 159 168 1983
- 2009 NHTSA Fatality Analysis Reporting System (FARS)
- National Pedestrian Crash Report NHTSA Technical Report DOT HS 810 968