ADBTF14_URS Influence of Urbanization on the Highway Infrastructure Safety

Influence of urbanization on

the road infrastructure safety

Zhang Tiejun [email protected]

China Free of High Risk Roads Page 2

Outline

1 Urbanization and road safety

2 Challenge

3 Safety audit and countermeasures

China Free of High Risk Roads

0%

4%

8%

12%

16%

0

100000

200000

300000

400000

500000

600000

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012

Increa

se a

ga

inst

la

st y

ear

GD

P (

10

0 m

illi

on

RM

B)

Absolute Number

Increase against Last Year

0

1000

2000

3000

4000

5000

6000

7000

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012

US

doll

ar

GDP GDP per capita

Annual increase rate of Chinas GDP reached 10.37% from 2003 to

2012,and GDP per capita from $ 1 273 increased to $ 6 091.




0

5000

10000

15000

20000

25000

30000

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012

Mo

tor v

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icle

s o

wn

ers

hip

(10

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0 u

nit

s)

0

20

40

60

80

100

120

140

160

180

200

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012

Mot

or v

ehic

le o

wner

ship

per

1000

pop

ula

tion

Motor vehicle ownership Motor vehicle ownership

per 1000 population

By the end of 2012, the motor vehicle ownership reached 240 million, increasing 1.49 times than that of 2003, and the motor vehicle ownership per 1000 population increased from 75 units in 2003 to 177 units in 2012.


50.57%

At 2011 ,urbanization rate beyond 50%

By the end of 2012, urban population beyond 712 million



With the increasing urbanization

rate, the crash fatalities:

In first stage, crash fatalities

significantly increased

In second stage, crash fatalities

began to decrease

Future estimation: crash

fatalities will decrease slowly

6

60

00

07

00

00

80

00

09

00

00

10

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11

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sw

30 35 40 45czh

95% CI predicted sw

sw


Traffic fatality begin to concentrate at suburbs, highway passing

through village segments. for example, in one highway, beyond 45.7%.


Village influence the vehicle operating speed:V85 decrease

nearly 20%




Village influence the vehicle track: Vehicle especially truck and

bus tend to drive away from lane edge line


Death rate of different travelers in urban area at Beijing(20062009*The

data quoted from Chen Yanyan, Beijing University of Technology

others

DEAD%


branch

roads

18%

sub

arterial

road

16%

arterial

road

60%

others

6%


Outline


2 Challenge



I. More focus on urban economy, land use and traffic

capacity than road traffic safety

II. Awareness of traffic safety needs to be enhanced

III.Road infrastructure can not fully satisfy the new

requirement, especially without adequate

consideration of pedestrians and cyclists.

IV.Lack of quantitative tools to support safety

management and design.

2 Challenge


Poor safety awareness

2 Challenge- case


Poor safety awareness


Complicated traffic composition


High speed limit

General segment:100km/h

intersection: 80km/h

Road function?

2 Challenge- case


Big size intersection without effective

channelization, pedestrian crossing is unsafe.

2 Challenge- case

Intersection without special pedestrian signal


Complex traffic compositionhigh truck proportion, signs and marketing lines are not

effective.

2 Challenge- case


Insufficiently used overpass


Insufficient signal design


Bus station


Outline


2 Challenge



Safety audit and ChinaRAP tool

Safety audit guideline for

expressway and class 1 highways

Compliance analysis for design

standard

Analysis of the safety checklist

Analysis of speed consistency



1 INTRODUCTION

1.1 Objectives

1.2 Audit extent

1.3 Documents used during the audit

2 PROJECT DESCRIPTION

2.1 Description of the road

2.2 Key points to road safety audit

3 ROAD ALIGNMENT AND DRAINAGE

3.1 Horizontal and vertical alignment

3.2 Cross-section

3.3 Drainage system

4 GRADE INTERSECTIONS

4.1 General audit

4.2 Detailed audit

4.2.1 Intersection of Gandong Ave and Anshi Ave

4.2.2 Intersection of Gandong Ave and Zhanbeier Rd

4.2.3 Intersection of Gandong Ave and Zhanqian Ave

4.2.4 Intersection of Gandong Ave and Weier Rd

4.2.5 Intersection of Gandong Ave and Guihuasi Rd

4.2.6 Intersection of Gandong Ave and Jinni Ave

4.2.7 Other intersections



5 TRAFFIC FACILITIES

5.1 TRAFFIC SIGNS AND MARKINGS

5.2 SAFETY PROTECTION FACILITIES

5.3 TRAFFIC MONITORING FACILITIES

6 PUBLIC TRAFFIC FACILITIES

6.1 PUBLIC TRANSPORT STATION

6.2 BUS STOP AUXILIARY FACILITIES

7 TRAFFIC FACILITIES FOR BICYCLE AND PEDESTRIAN

7.1 FOR BICYCLE

7.2 FOR PEDESTRIAN

7.3 ACCESSIBILITY FACILITIES

8 CONCLUSIONS AND SUGGESTIONS

8.1 ROAD ALIGNMENT AND DRAINAGE

8.2 GRADE INTERSECTIONS

8.3 TRAFFIC FACILITIES

8.4 PUBLIC TRANSPORT FACILITY

8.5 BICYCLE AND PEDESTRIAN


Risk assessment technique is a quantified decision-making tool to

improve safety at road network.

Draw a risk map, and define high risk

segments and roads.

Indentify causes of high risk, estimate

future risk changes.

Optimize the allocation of funds , and

choose the investment plan with best

B/C ratio.

Track investment effect, and evaluate the

actual safety effects.

Interactive design.


Infrastructure

safety goal

Design

drawing

The

original

road risk

assessment

Safety

design

concept

Design

drawing

risk

assessm

ent


Special plan and

design for highway

segments passing

through villages



Intergrated design to promote the use of overpass


31


CJJ37-2012

GB50647-2011

,

Put more consideration of vulnerable road user safety in road design

standard



www.chinarap.net

Thanks


Contact Details

Zhang Tiejun

Senior Engineer, RIOH

E: [email protected]

M: 139 1102 4196

A: RIOH, Beijing

Websites:

http://www.chinarap.net