vru safety traffic calming measures in urban & rural...
TRANSCRIPT
![Page 1: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/1.jpg)
VRU Safety &
Traffic Calming Measures in Urban & Rural Areas
![Page 2: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/2.jpg)
2 What is Traffic Calming ?
Road engineering approaches aimed at bringing the design of the road in accordance with the desired speeds of the vehicles plying on them
• reduce the negative effects of motor vehicle use
• alter driver behavior
• improve conditions for non-motorized street users
![Page 3: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/3.jpg)
Essence of the Traffic Calming techniques
Road design and engg. measures that REDUCE adverse effect of motorized traffic
on built up areas by
• Reducing vehicle speeds and direction
• Reserving more space for pedestrians and cyclists
Value
• Self-enforcing measures that produce benefits >> costs
• Potential to reduce accident levels by 40%
![Page 4: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/4.jpg)
Need for adapting TC techniques to Indian conditions
• Heterogeneity of traffic in urban areas / intercity roads
• Passage of Highways through townships and villages
![Page 5: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/5.jpg)
Conditions prevailing on Highways :urban like?
Mixing of local traffic with high speed through traffic
Highway passing through towns/village~1.5 km highways through the village
![Page 6: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/6.jpg)
Speed variation and Mixed traffic
• High speed variations due to presence of NMT, small vehicles on highways.
• Presence of Motorized two wheelers and non motorized vehicles.
0
10
20
30
40
50
60
0
10
20
30
40
50
60
70
NH-58 NH-73 NH-31 NH-31 NH-73 SH-67 NH-74 NH-30 NH-58 NH-7 SH-5 SH-6 SH-14 SH-59 SH-47 SH-47 NH-73
Speed variation on Highways in India
V85 V50 V15 (V85- V50)/ (V50- V15)
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
244 408 412 250 412 839 1,032 480 580 1,211 228
NH-58 NH-73 NH-31 NH-31 NH-73 SH-67 NH-74 NH-30 NH-58 NH-7 SH-5
Share of different Travel modes present on highways
Car/ jeep Truck/ bus MTW 3-Whee-ler Bi-cycle Tractor Others
![Page 7: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/7.jpg)
Traffic movement and crash patterns
• Proportion of pedestrians and MTW in fatalities 20-40%
• Highway shoulders used by parked vehicles, slow moving vehicles(tractors, bicycles, animal carts)
• Right most lane used by heavy vehicles
• Overtaking maneuver from passenger side
0 50 100 150 200 250
Pedestrians
Bicycle
Motorised two-wheeler
Car
Bus
Truck
Unknown & Others
Mumbai (2008-2012) Delhi (2013) Highways (1998)
2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)
![Page 8: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/8.jpg)
Injury Producing Sytems
• Accident is a failure in a subsystem, or the system as a whole that damages one or more unit
Environment
Human
Equipment
![Page 9: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/9.jpg)
Systems Approach
• Structural analysis of injury producing systems
• Focus is on the injury causing properties of systems rather on the errors of owners, designers, operators.
• Moving away from conventional explanations which are myopic overlooking the interrelationships between the various components of the system.
![Page 10: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/10.jpg)
Traffic safety principles/the corner stones for developing safe highways in LMICs.
Pedestrians will make mistakes in judging the possible risk in the system whereas, drivers can make mistakes in adopting an appropriate speed.
• Principle 1 Recognition of human frailty
• Principle 2 Acceptance of human error
• Principle 3 Creation of a forgiving environment and appropriate crash energy
management.
Principle 1 and 2 must recognize that highways in LMICs will have presence of NMVs and pedestrians along with motorized traffic.
Principle 3 becomes the operational principle for setting appropriate speed limits for ensuring a forgiving environment for all road users.
![Page 11: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/11.jpg)
Fifth Annual TRIPP Lecture
Discussion on a paradigm shift
Relative contribution
Driver failures:
‘excess’
11
MoRTH continues emphasis on driver’s fault ~ 78%
Based on police reports
![Page 12: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/12.jpg)
SAFE SYSTEM APPROACH
Forgiving roads/streets
Speed management by design
![Page 13: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/13.jpg)
Conflict between safety and mobility
• Higher level of service implies higher speeds-i.e. higher probability of fatality
0
20
40
60
80
100
0 10 20 30 40 50 60 70
Impact speed km/h
Probability of
pedestrian
fatalityPercent
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Sustainable Safe traffic system
a road environment with an infrastructure adapted to the limitations of the road user;
vehicles equipped with technology to simplify the driving task and provided with features that protect vulnerable and other road users; and
road users that are well informed and adequately educated.
![Page 15: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/15.jpg)
![Page 16: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/16.jpg)
ACCIDENT SEVERITY TYPES OF ACCIDENTS
AFFECTED
BEST
ESTIMATE
95% CONFIDENCE INTERVAL
Speed humps
Injury accidents All accidents on roads with
speed humps
-41 -57;-34
Injury accidents All accidents on roads
nearby roads with speed
humps
-7 -14; 0
Raised junctions
Injury accidents Accidents at junctions +5 -34;+68
Property damage
only accidents
Accidents at junctions +13 -55;+183
Rumble strips in front of junctions
Injury accidents Accidents at junctions -33 -40;-25
Property damage
only accidents
Accidents at junctions -25 -45;-5
Unspecified Accidents at junctions -20 -25;-5
Speed zones
Injury accidents All accidents -27 -30;-24
Property damage
only accidents
All accidents -16 -19;-12
![Page 17: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/17.jpg)
Influencing Driving Behavior
• Signs• Markings• Gates
![Page 18: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/18.jpg)
Lane Narrowing
![Page 19: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/19.jpg)
Humps
![Page 20: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/20.jpg)
Circular Hump
![Page 21: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/21.jpg)
Trapezoidal Hump
![Page 22: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/22.jpg)
H- Hump
![Page 23: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/23.jpg)
Feedback signs
![Page 24: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/24.jpg)
Textured paving over raised crossings
![Page 25: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/25.jpg)
Uneven road surface
![Page 26: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/26.jpg)
Thermoplastic bar markings
![Page 27: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/27.jpg)
3 Traffic Calming Measures in Urban Areas
Vertical deflections - Vertical shifts in the carriageway are the most effective and reliable of the speed reduction measures currently available.
Circular Hump in IIT Delhi (Figure 3-2 ) Speed Bumps
![Page 28: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/28.jpg)
Horizontal deflections
• Staggering - horizontal deviation of vehicles on the road, restricting them to known turning radii at different speedsfor different vehicle types.
• Chicanes
![Page 29: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/29.jpg)
Mini-roundaboutsEffective solution for residential areas with single carriageway roads where the vehicle speeds should not exceed 30 km/h
![Page 30: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/30.jpg)
Horizontal Deflections
![Page 31: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/31.jpg)
Horizontal Deflections
![Page 32: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/32.jpg)
Suggested treatment for Mid-Block crossing (Fig 2-33) and
Road junctions (Fig 2-34) with raised areas for pedestrians
Figure Error! No text of specified style in
document.-1 Design to facilitate mid-block crossing
(Rehman, et al., 2009)
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Eligibility criteria & Area of ApplicationTC techniques for RESIDENTIAL ROADS
Speed limit <20 km/h Pedestrian crossing Left Turns Intersections
Speed hump
Type 1(parabolic)
Speed hump
Type 2(flat top)
Rumble strips
Texture change
(uncut stones)
Raised paint markings
(audible markers)
Paint markings
![Page 35: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/35.jpg)
Safe environment for the vulnerable road users within local communities
Unhindered and swift movement
of the pass-through traffic.
4-Traffic Calming on Rural Roads (Highways)
![Page 36: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/36.jpg)
Urban Roads
![Page 37: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/37.jpg)
Speed Zones on NH/SH passing through village (Fig 4-1)
![Page 38: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/38.jpg)
Rural Roads (Highways)Checklist
![Page 39: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/39.jpg)
Rural Roads (Highways)
![Page 40: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/40.jpg)
Rural Roads (Highways)
![Page 41: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/41.jpg)
Hill RoadsChecklist
![Page 42: VRU Safety Traffic Calming Measures in Urban & Rural Areastripp.iitd.ernet.in/assets/newsimage/GT2-VRUsafetyandTC.pdf · 2lane NH 8 (2010-2014) 4lane NH24 (2010-2014) 6lane NH1 (2010-2014)](https://reader034.vdocuments.net/reader034/viewer/2022050421/5f9062e753e7887a495c25b1/html5/thumbnails/42.jpg)
Hill Roads