Research on Daytime Running Lamps of Motorcycles Expert from JAPAN Transmitted by the expert from Japan Informal document No. GRE (75th GRE, 5-8.

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Presentation transcript:

Research on Daytime Running Lamps of Motorcycles Expert from JAPAN Transmitted by the expert from Japan Informal document No. GRE (75th GRE, 5-8 April 2016 agenda item 7 (i))

Background and Purpose Permanent lighting of motorcycle headlamps mandatory since 1996 Effective in reducing motorcycle accidents Instead of headlamps, daytime running lamps (DRLs) are permitted as option since Japan conducted the research in order to verify the effects of Motorcycles DRLs on road traffic in terms of glare.

Test Conditions 2 ItemsConditions Sky illuminance Day (10,000 lx) Dusk (2,000 lx, 1,000 lx) Night (0 lx) Motorcycle lamp Passing beam （ＬＢ） : originally installed Daytime running lamp （ＤＲＬ） Motorcycle speed40, 60, 80 km/h Eye-point height of test subjects 1,200 mm Motorcycle lamp height Centre of ＬＢ： 873 mm Centre of ＤＲＬ： 1,200 mm Motorcycle lamp light source ＬＢ： Halogen (H4 bulb) ＤＲＬ：ＬＥＤ Related requirements about Motorcycle DRL *Intensity: not less than 400 cd in the axis of reference not exceed 1,200 cd in any direction (UN-R87) *Height: 250 mm ~ 1,500 mm above the ground (UN-R53) Passing beam DRL

Outline of Research * Purpose: to study whether drivers of 4-wheeled vehicles feel glare caused by an oncoming motorcycle with the DRL or low beam (“LB”) ON. * The situation: a motorcycle is approaching when the 4-wheeled vehicle is turning right. * The drivers made sensory evaluations of the glare caused by an oncoming motorcycle with the DRL or LB ON m 6m Driver (Test subject) [With the DRL ON] [With the LB ON]

Results: Evaluation of glare by the drivers Dusk : 1,000 [lx] Percentages of test subjects’ evaluation ratings 4 Night : 0 [lx] 9: Imperceptible 8: 6: 4: 2: 7: Satisfactory 5: Tolerable 3: Disturbing 1: Intolerable Day : 10,000 [lx] Percentages of test subjects’ evaluation ratings Dusk: 2,000 [lx] 9: Imperceptible 8: 6: 4: 2: 7: Satisfactory 5: Tolerable 3: Disturbing 1: Intolerable

Summary * The lower sky illuminance becomes, the more glare was felt. *About 80% of the test subjects feel glare caused by DRLs at night. 5 The DRLs of motorcycles shall not be used at night.

Thank you for your attention ! 6