The purpose of this report is to analyze the crash- reduction benefits of LED stop lamps and LED center high-mounted stop lamps (CHMSL) using real-world crash data. Previous work on this subject included laboratory experiments that suggest LED lamps were more beneficial than incandescent lamps at preventing rear-impact collisions. NHTSA statistically compared the overall ratio of rear-impact crashes to a control group of frontal impacts before and after the switch to LED. Overall, the analysis does not support a firm conclusion about whether LED stop lamps and LED CHMSL are more effective than incandescent lamps. The main analysis shows a significant overall 3.6% reduction in rear-impact crashes with LED. On the other hand, a non-parametric analysis not only fails to show improvement in significantly more than half the models, but actually shows an increase in rear impacts with LED for 9 of the 17 make-models that switched to LED. It was just the favorable results for high- sales vehicles such as Honda Accord that pulled the overall result into the plus. Furthermore, and perhaps most important, none of these 17 make-models is a clean switch pair that shifted to LED without changing anything else. All of the switch pairs shifted to LED at the same time that they changed the rear-lighting configuration and/or redesigned the vehicle. Basically, the crash data probably wont support a firm conclusion until we have more switch pairs, including some clean switch pairs.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Effectiveness of LED Stop Lamps for Reducing Rear-End Crashes: Analyses of State Crash Data


    Beteiligte:

    Erscheinungsdatum :

    2013


    Format / Umfang :

    28 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Optimum luminances and areas of rear-position lamps and stop lamps

    Schmidt-Clausen,H.J. / Tech.Univ.Darmstadt | Kraftfahrwesen | 1985




    Roadway crash analysis - a method for reducing traffic crashes

    Datta,T.K. / Wayne State Univ.,Detroit,US | Kraftfahrwesen | 1993


    Effects of Dedicated Stop Lamps on Nighttime Rear-End Collisions

    J. Luoma / M. Sivak / M. J. Flannagan | NTIS | 2006