European Best Practices in Vertical Signing

Transcription

1 European Best Practices in Vertical Signing Rik Nuyttens 3M Europe February 2015 Athens, Greece

2 Visibility & Safety for Life of the Road Basic Principles Sustainable Innovation Low Cost Measures for High Risk Areas High Accident Road Sections (Black Spots) Rail Road Crossings Construction Workzone Safety Schoolzone Safety

3 Quick Facts Driving is a highly visual task (some 1 say 90%) Total distance driven at night is 1/3 versus daytime But crashes are about the same day and night fatality rate x 3 during nighttime 2 Lack of visibility at night is a significant challenge for drivers 1. Kline et al, Vision, Aging, and Driving: The Problems of Older Drivers, March 1991, The Journal of Gerontology 2. US Federal Highway Administration, 3. Schnell, T., Yekhshatyan, L., Daiker, R., Konz, J., Effect of Luminance on Information Acquisition Time and Accuracy from Traffic Signs. Paper accepted for presentation and publication, Transportation Research Record, Journal of the Transportation Research Board, Full report available at 3M All Rights Reserved.

4 Challenges Increasing number of vehicles More kilometers traveled by person Increasing heavy vehicle traffic Congestion in and around cities Pollution

5 Other challenges Aging population Vulnerable road users (pedestrians / cyclists)

6 Safe Roadway Design Source: General Overview on Road Safety, Lecture Notes, Dr. Rune Elvik, Institute of Transport Economics, Norway, September, 1999.

7 Driver Information Needs

8 How the Technology Works Glass Bead Technology 3M All Rights Reserved.

9 Engineer Grade 3M All Rights Reserved.

10 3M All Rights Reserved. How Prismatic Technology Works

11 Truncated Cube Optics (Non-canted) 3M All Rights Reserved.

12 Cone of Returned Light Reflected Light in Divergence Cone Retroreflector 3M All Rights Reserved. Light Source Direction Most retroreflectors also have diffuse reflection. Diffuse reflected light is simply wasted, as it does not help the nighttime driver. Higher efficiency sheetings divert more light toward the driver.

13 30% Total Retroreflective Efficiency 30% Total Retroreflective Efficiency Retroreflective Efficiency Minimal retroreflection to larger observation angles All 30% to smaller observation angles 15% to larger observation angles 3M All Rights Reserved. Only 15% light remains for smaller observation angles All truncated cube corner sheetings have nearly 30% retroreflective efficiency.

14 3M All Rights Reserved. Full-Cube technology

15 Full-Cube Sheeting Retroreflective Efficiency Reflective Sheeting Efficiencies Type XI % Efficiency Enclosed Bead Encapsulated Bead Truncated Cube Corner Full Cube Corner 0 Reflective Sheeting Efficiencies 3M All Rights Reserved.

16 h Where do drivers read signs? Where can we first start reading signs? Legibility index is measure of the reading distance as a function of letter height (with adequate contrast) D/h = 500 (or 5 m/cm of letter height) 1 Do drivers read the signs at 5 m /cm? Not necessarily. Reading occurs in a range, typically around 4 m/cm. Younger people sooner than elder. Motorway signs use 30 cm letter height, to allow enough time. 1. Mace, D. J, Sign Legibility and Conspicuity. In Special Report 218: Transportation in an Aging Society, vol.2, pp Schieber, F., Burns, D. M., Myers, J., Willan N., Gilland, J. Driver Eye Fixation and Reading Patterns while Using Highway Signs under Dynamic Nighttime Driving Conditions: Effects of Age, Sign Luminance and Environmental Demand. in TRB 2004 Annual Meeting Washington, D.C.: TRB. 3M All Rights D

17 + Sustainable Innovation Prismatic versus glass bead sheeting manufacturing process >95% less VOC >75% less energy >40% less solid waste Higher Mw polymers resulting in more durable sheeting DG³ returns up to 58 % light, means 81% more light than traditional prismatic sheeting Replace illuminated signs Save energy to illuminate the signs Lower infrastructure investment costs Greatly reduces maintenance costs Return on investment : 11 : 1 (praxis : Illinois DOT Hungary Israel Belgium )

18 BEFORE Lit High Intensity Unlit High Intensity Photos 3M taken All by Rights Nevada DOT Reserved.

19 AFTER Action Items: -replaced burned out luminaires on 395 sign -added DG 3 sheeting to Wells Avenue Lit High Intensity Unlit DG 3 3M All Rights Reserved. Photos taken by Nevada DOT

20 Full Cubes replace illuminated Signs Hungary Average Illuminated vs DG³ sign : Installation cost : > 100 Electricity cost : > 200 Maintenance cost : > 120 Bulb Changes : > 15 Illuminated sign imparts extra cost of > 400 / sign /year 3M All Rights Reserved.

21 Short wavelength light is absorbed by sign. Ordinary Short wavelength light is reemitted as longer wavelength light. Dusk/Dawn Fluorescent Impact Fluorescent 3M All Rights Reserved.

22 Advantage of Fluorescent Colours

23 Black Spots in Hungary Route # 6219 Road section between Mezöfalva and Sárszentmiklos New signs and pavement in March 2001 Additional speed reduction was implemented

24 Route # 6219 Before After

25 Route # 6219 Accident Statistics Leath Seriou Slight

26 Romania

27 Brussels Ring, Forest, Belgium September 2000 Renewal of pavement, pavement marking, barriers and vertical signing

28 Brussels Ring, Forest, Belgium Injured a/or killed Property Damage # Accidents Mth Diff Diff Diff Tot

29 Black Spots in Croatia Study : Changes of Driver s Environment & Road Traffic Safety (I.Dadic V.Maric) Road Design Planners design it from a bird s eye view Drivers experience it from a worm s eye view Black Spot Assessment from: Point of view of all drivers (incl Trucks, Buses, ) All driving directions & lanes All times of the day All weather conditions May need atypical solutions

30 Black Spots in Croatia Case Study : Djakovo Bracevci : Road D Curve : Radius : 35 m Av Access Speed : 86,5 km/h Top curve speed : 34,0 km/h Nov 95 :new signs before & in curve Accident Statistics 89 Nov 95 : 119 (no fatal) Nov 95 Oct 97 : 3 (no fatal)

31 Bulgaria

32 Construction Work Zone Safety

33

34 Studies : ARROWS Gate Effect = announce the upcoming changes in road situation

35 3M Confidential Norway New regulations since 2006 Better safety in CWZ both day and night Based on Sintef studies Performance aspects : Fluo yellow combinded with red Type 3 reflective material

36 Studies : PREVENT (2) CWZ Types Long term (>24 uur) Short term - fixed Short term - mobile CWZ lay out : 1. Warning zone 2. Entry zone 3. Transition-In zone (provide safety to workers) 4. CWZ 5. Transition- Out zone 6. Traffic normalisation zone

37 CWZ : PREVENT

38 Fluorescent Orange + Type 3 Belgium

39 Romania : Schoolzone Solution to comply with local authorities & traffic police demands based on driver needs More visible traffic signs Kids protection in school area New traffic sign developed Demo sites

40 Belgium

41 Belarus (Minsk)

42 Schoolzone Safety in Denmark Positive press article : Speed reducer brings speed to km/h in front of school. Through-traffic avoids the schoolzone Call for wider use of these speed reducers

43 Poland : Rail Road Crossings

44 After

45 After

46 Germany

47 Germany

48 Germany

49 European Best Practices in Vertical Signing Rik Nuyttens 3M Europe February 2015 Athens, Greece