Assessing the health impacts of Transport systems - BRT · Or, more energy -efficient & walkable...
Transcript of Assessing the health impacts of Transport systems - BRT · Or, more energy -efficient & walkable...
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Assessing the health impacts of Transport systems - BRT Dr Carlos Dora Coordinator Interventions for Healthy Environments PUBLIC HEALTH AND ENVIRONMENT
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Public health and environment 2 |
This presentation covers 1. Transport as a driver of health
2. Health & transport indicators – capture key nodes of interaction
3. Large research gaps exist regarding evidence of sustainable interventions in developing cities on air quality, physical activity and injury prevention
4. Seizing the opportunity to: Build integrated evidence of health benefits from bus/rail rapid transit systems – considering air pollution, physical activity and injury
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Public health and environment 3 |
Transport & Health Linkages urban land use & energy demand, air pollution,
physical activity & injury risks
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Public health and environment 4 |
Global transport health burden (annual)
Outdoor urban air pollution → 3.3 million deaths
Physical inactivity → 3.2 million deaths; 19 million healthy life years lost
Traffic injuries → 1.24 million deaths
Traffic noise → stress, memory loss and analytical impairment
Climate change → over 150 000 deaths
Access to vital goods and services, social networks/equity/cohesion → under reported
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Public health and environment 5 |
T-Related Air Pollution leads to heart and lung disease and
premature deaths • Increases in hospital
admissions, and asthma attacks
• To loss of millions of working days
• Children living near busy roads with heavy/diesel vehicle traffic have higher risks of respiratory problems.
• Every 10 µg/m3 decrease in PM2,5 leads to 3,4% decrease in mortality
• Health impacts are larger in lower socioeconomic groups ( l ti )
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Public health and environment 6 |
Better air quality improves health
The health benefits of a ban of coal sales in Dublin
Clancy et al 2002
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Public health and environment 7 |
Reduction in fine PM and mortality: extended follow up of Harvard six Cities Study
7/9/2013
Period 1: 1974-89 (mean PM2.5: 1980-85) Period 2: 1990-98
Laden et al. AJRCCM 2006
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Public health and environment 8 |
Findings significant since 30 minutes daily of active travel is enough to make a difference for health
Reduce risk of coronary heart disease – by 50%
Reduce risk of non-insulin-dependent diabetes and obesity – by 50%
Reduce hypertension risk – by 30%.
Reduce colon and breast cancer (50% reduction in colon cancer in long-term Shanghai study)
Help maintain bone mass and protect against osteoporosis
Improve balance, coordination, mobility, strength and endurance
Increase self-esteem, reducing levels of mild to moderate hypertension and promote overall psychological well-being.
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Public health and environment 9 |
60% of world population does very little physical activity
Most health gains from getting the inactive to move
Health Benefits
A B C
Physical activity level
low high
A = inactiveB = activeC = trained
Greater health benefits among least active
Dose-response physical activity and health,
B Martin et al, 2004
Active transport is PA with a
practical purpose
No need to go to the Gym
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Public health and environment 10 |
Traffic Noise is a major cause of annoyance; Interferes With Memory, Attention and Ability to Deal With Analytical Problems
Emerging and consistent evidence for impact on hypertension and cardiovascular disease
Children chronically exposed to loud noise show:
• impaired acquisition of reading skills,
• attention and problem-solving ability.
Road traffic is the major source of exposure to noise.
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Public health and environment 11 |
Psychological Barriers - How people feel about moving through an area:
Perceived danger
Traffic noise
Can combine to produce:
Trip Suppression Traffic pollution
Community Severance
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Public health and environment 12 |
Traffic Deaths: 1,2 million/year Traffic Injuries over 40 million/year
Share by age groups
0% 10% 20% 30% 40%
60+
45-59
30-44
15-29
5-14
0-4
male female
Source: Peden et al (2004)
0-4
5-14
15-29
30-44
45-59
60+
Male Female
Share by age group
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Public health and environment 13 |
Children pay a High Price
• They are at higher risk of being involved traffic injuries.
• Play unhindered by street traffic = double social contacts
• Restrictions to walk and cycle hinder the development of their independence.
• Lack of physical activity leads to obesity.
Obesity in children BMJ, 2001; 322:24-6
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Public health and environment 14 |
Cardiovascular disease, mainly heart disease, stroke
Cancer Chronic respiratory diseases Diabetes
Potential to prevent main global cause death - Chronic diseases
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Public health and environment 15 |
Transport can be a 'facilitator' or a 'burden' on health
Transport systems offer vital access to health-essential goods, services, education and employment – and to physical activity and social networks.
Poorly designed transport systems create a health burden directly (injury risks) and indirectly (equity, access, social cohesion, etc.).
Conventional transport indicators fail to capture the full range of positive & negative health impacts
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Public health and environment 16 |
The vicious cycle:
Increased traffic injury risks
Parents drive their children to school by
car
Traffic increases
Streets are even more dangerous
More children are physically inactive and obese
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Public health and environment 17 |
Holland Germany US
Walking share of urban trips 18% 22% 6%
Biking share of urban trips 28% 12% 1%
Pedestrian fatality rate (deaths/100M km) 2.5 4.4 14.0
Bicyclist fatality rate (deaths/100M km) 2.0 3.2 7.2
Source: Pucher and Dijkstra, Promoting safe walking and cycling to improve public health: Lessons from the Netherlands and Germany, Am J Public Health, 2003: 93:1509-16.
Busy road environment puts pedestrians and cyclists at risk
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Public health and environment 18 |
Narrow solutions: limited results. e.g. Continuing Traffic
Growth Has Cancelled Out Pollution Savings from Cleaner and More Efficient Vehicles
• Cars are becoming heavier and more powerful.
• Trips are becoming increasingly long.
• Total kilometers traveled by road continues to grow
EC: Transport in Figures, 2000
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Public health and environment 19 |
Driving policy change towards adopting healthy urban transport
– facilitating a transition • Governance – how governments, social
organizations interact, how they relate to citizens and how decisions are taken in a complex globalized world (Institute of Governance, Ottawa, Policy Brief 2003)
New types of: • Leadership • Engagement • Accountability and transparency
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Public health and environment 20 |
Diffusion of governance – who do we need to engage with?
Private sector Public sector
Third sector
Supranational level
Transnational corporations
Intergovernmental organizations
NGOs
National level National corporations
State National non-profits
Subnational level
Local businesses Local government Local groups
Governance.com: democracy in the information age, E.C. Kamarck & J.S. Nye Jr. (eds) 2002
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Public health and environment 21 |
What information is relevant to those groups?
Technical solutions are needed, but not sufficient to enable change
• Economically sound? • Fair? does it improve equity? • Long term implications – does it protect
children? • Does it respond to aspirations of different
groups in society? • Does it respond to society's greatest
concerns? e.g. Climate Change, Green Economy
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Public health and environment 22 |
To ensure sound economic decisions
The Market for transport fails to deliver socially optimal patterns as – Transport Costs are not all paid for the user, and
the costs borne by others (external costs) are substantial.
– The overall use of transport, particularly more polluting modes, is then higher than socially optimal
– The right investments and prices (for pollution, accidents etc.) would correct these distortions
The end result is cost to all society that are not seen by the
individual: • absenteeism to work and costs to businesses, • increasingly high health care costs of chronic diseases,
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Public health and environment 23 |
To ensure policy making draws on existing knowledge and best
practice • Difficulty in accessing information on the
health impacts of transport interventions • Myths about what is good practice are
repeated and reinforced • Scientific evidence is scattered, and often
not translated regarding its implications for policy
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Public health and environment 24 |
To protect vulnerable groups
• Children are vulnerable to injuries, air pollution and noise, their cognitive and physical development require exploration of the neighbourhood and outdoor activity.
• Children and other vulnerable groups are exposed to risks from traffic but enjoy few benefits from it.
• These groups often do not have a voice to influence decisions. Evidence should make their case heard
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Public health and environment 25 |
To promote health equity Exposure to health risks depends on mode of
transport used Need to ensure safety of people using all modes Pedestrians and cyclists do not cause pollution,
contribute to reducing traffic congestion, will use health services less and be more assiduous to work, but are exposed to health risks caused by motor vehicle users (injuries, pollution)
Policies that reduce the health risks of the poor help
reduce poverty Healthy mobility for the poor also improves health by
i i t j b d ti d h lth
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Public health and environment 26 |
Health 'co-benefits' can pave the transition from a grey (oil-based) to
"green" economy • Green Urbanism – land use plans, public transport and walking and cycling lead to:
• Less obesity, traffic injuries, cardiovascular & respiratory diseases
• More access to goods and services for all – less inequity – human security
• Access to healthier, varied, lower-fat diets – more sustainable food production
• Energy security – less dependence on oil
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Public health and environment 27 |
Transport policies with excellent health performance:
Walking, Cycling, Public Transport/ Rapid Transit
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Public health and environment 28 |
Transport drives physical activity: As Latin American cities develop, will they follow the USA or European models?
% by travel mode
Asian cities (high/low)
European cities USA cities
Active travel 19% 18% 5% Transit 43% 23% 3%
More car-dependent and sprawling (USA model) Or, more energy-efficient & walkable (European)
Source: Peterson R. Sustainable Transport, a Sourcebook for Policymakers, BMZ, 2002
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Public health and environment 29 |
Transport drives injury risks: But safety aspects of rail/bus transport largely ignored
• Rail and bus are the safest modes of travel (ETSC, 2003), even so :
• Priority is given to individual injury protection over “systems”
approaches.
• Few health-oriented studies on injury impact of transit interventions
• Transport planning gives little priority to the comparative advantages of transit in terms of injury risks
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Public health and environment 30 |
Holland Germany USA
Walking urban trip share 18% 22% 6% Biking urban trip share 28% 12% 1% Pedestrian mortality rate (deaths/100M km) 2.5 4.4 14.0 Bicyclist morality rate (deaths/100M km) 2.0 3.2 7.2 Source: Pucher and Dijkstra, Promoting safe walking and cycling to improve public health: Lessons from the Netherlands and Germany, Am J Public Health, 2003: 93:1509-16.
Transit-oriented cities make walking & cycling safer and easier
(e.g. more bike space lanes, greater predictability of systems)
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Public health and environment 31 |
WHO’s Health in Green Economy series Documenting health impacts of energy interventions
:
• Transport (300 studies reviewed)
• Housing • Cities • Energy access for the
poor • Greener and more
resilient health facilities
WHO has been reviewing the evidence about low-carbon, energy efficient policies that enhance health through...
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Public health and environment 32 |
Findings: transit use positively associated with more physical activity, less air pollution, and fewer injuries
Review of studies on health outcomes in association with use of different urban travel modes – WHO/Health in Green Economy (2011)
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Public health and environment 33 |
Findings: Transit investments also positively associated with physical activity, less injuries & air pollution
Review of studies on health in association with different modes of transport investments WHO/Health in Green Economy (2011)
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Public health and environment 34 |
However large gaps in evidence remain:
• Transit/BRT health effects far less studied than vehicle or walking/cycling travel modes
• Lack of integrated studies for Transit/BRT looking at all health issues (Air quality, physical activity, injuries & social equity)
• Most studies on health aspects of bus/rail transit focus on developed countries
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Public health and environment 35 |
Our global review found only the following studies on health & transit: • 4 studies on ambient air pollution exposures – (3 of these
found transit beneficial; one was neutral) • 2 studies on injury risks – (both found BRT/rail safer) • 20 studies on physical activity – including a systematic review,
(Lachapelle U et al, 2010) which found transit use associated with significantly more physical activity.
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Public health and environment 36 |
Systematic review of transit & physical activity - Lachapelle U et al. “Commuting by public transit and physical activity: where you live, where you work, and how you get there.” Journal of Physical Activity and Health, 2010
“Of 1,733 articles reviewed, 27 met inclusion criteria. A range of 8-33 additional minutes of walking was identified from this systematic search as being attributable to public transport use: Greater uptake of public transport by inactive adults would likely lead to significantly greater increases in the adult population considered significantly active.”
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Public health and environment 37 |
Indicators of Healthy Transport:
We need to track impacts in four domains
Measuring access/physical activity – can inform us about key health benefits of sustainable transport. Measuring pollution and injury – can inform us about key health risks of transport systems.
Access/equity of access
Physical activity
Pollution (air, noise and water)
Traffic injury
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Public health and environment 38 |
But --- Transport indicators continue to measure focus on road vehicles – not people
(a little bit of) public
transport ridership
(a little) urban air pollution
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Public health and environment 39 |
Example 1: Global data on injuries not systematically collected for bus/rail travel mode
Data Collection for Modes of Travel Includes: Cyclists; Drivers/passengers of 4-wheeled vehicles Drivers/passengers of motorized 2- or 3- wheelers Other unspecified road users Pedestrians
Total number of road traffic deaths by country - WHO 2010
Number of Deaths by Country Dark Green <1000 Light Green 1001-5000 Yellow 5001- 10 000 Tan 10 001-50 000 Red >50 000 White – No data
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Public health and environment 40 |
Example 2: Key transit/public transport indicators also are missing from global transport data bases:
World Bank tracking of urban transit, cycling and pedestrian investments is folded into “general transportation”
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Public health and environment 41 |
Example 3: Standard CBA models for roads & fail to consider transit alternatives
World Bank’s highway development and management CBA model (HDM-4) considers a limited set of health and environmental risks but not the benefits of alternative, transit-oriented investments
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Public health and environment 42 |
Example 4: Jobs & poverty reduction benefits from transit also largely ignored: Our report found:
‘Investment in public transport and rapid transit may be a more effective means of generating stable local jobs and more economic value-added’ than road-building because:
• Transit projects are labour intensive • Transit creates long-term jobs • Transit increases access of disadvantaged groups to employment centres and
can lower their travel costs In addition, a greater share of transit’s total economic investment is typically allocated to salaries and ongoing system operations, as compared to the transport investment for private vehicle fuel consumption & maintenance. Further research is needed to better describe this and other equity impacts.
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Public health and environment 43 |
Lack of research and indicator data contributes to a 'vicious cycle' of bad decisions & health impacts
More vehicles = more road space/construction for vehicles = greater air pollution, noise and physical activity risks
Hanoi, 1993
Hanoi, 2001
Hanoi, 2002
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Public health and environment 44 |
Summary: BRT seems to be good for health in theory – where is the evidence from implementation?
Bus Rapid Transport (BRT) in Bogota – before and after
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Public health and environment 45 |
Transit is the most neglected system in terms of research into health impacts
• Transit is usually cleaner – not well documented
• Transit induces physical activity – not well measured
• Transit is generally safer – but no global data collection
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Public health and environment 46 |
Measurement of BRT's impacts on health through better collection of indicators on:
Shifts in modal split including transit/walking/cycling in and beyond the BRT corridor.
Change in average PM10 levels in the neighbourhoods near the corridor, and city-wide.
Ridership by vulnerable groups – children, women, poor elderly, disabled
Poverty reduction & health equity benefits, direct and indirect --terms of job creation, job access and lower transport costs
Broader, systematic evaluation of BRT is needed to drive policies and investments
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Public health and environment 47 |
Simple targeted surveys can yield rich insights into health
People on heavily- trafficked streets reported fewer neighbourhood friendships - Appleyard, 1981
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Public health and environment 48 |
Economic data can be harnessed to health indicators e.g. WHO HEAT – quantifying health gains from cycling infrastructure investment in
terms of avoided traffic injuries and health care costs
www.euro.who.int/transport/policy/20070503_1
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Public health and environment 49 |
Towards Latin America- led research collaboration on BRT & health
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Public health and environment 50 |
Latin America is a developing world leader in public transport & BRT BRT models in Curitiba, Bogota & Mexico City are the “largest and most successful to date” (IPCC, 2007)
BRT can translate concerns over planetary boundaries (Rockstrom & Griggs) to local actions
Beijing modal split (Beijing Yearbook, 2011) Curitiba modal split, (ICLEI, 2011)
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Public health and environment 51 |
No health in Rio + 20 preparatory documents
• Health indicators for the Rio thematic areas: energy, water, food, jobs, cities, disaster management.
• Health Impact Assessment framework
• Robust evidence of linkages between sector policies and health,
• Health indicators of achievement of the other sector goal
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Public health and environment 52 |
Rationale - Better health can result from green economic strategies – but only if health is considered in the planning and implementation
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Public health and environment 53 |
1. Health indicators are science-based, anchored in:
• Empirical evidence of environment/ecosystem risks & health impacts;
• Large epidemiological studies of population impacts in real settings;
• Rigorous systematic review of a wide body of knowledge.
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Public health and environment 54 |
2. Health indicators are people-focused, but also comprehensive
Health is a “litmus test” for green economy strategies that yield the optimal SD results in social, economic and environmental dimensions.
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Public health and environment 55 |
BEIJING, Oct. 4 (UPI) -- China has proposed stricter standards for determining its air pollution index. Currently China's government doesn't include data for the finest particle pollutants, those of 2.5 micrometers or less, known as PM2.5.Experts say these ultra-fine particles, caused mostly by cars and coal burning, can easily penetrate the lungs and bloodstream. Such particles account for more than half the weight of industrial dust in the air of northern China, Jinhua Daily newspaper reports.
3. Health indicators use readily available data/tools, e.g. air quality measures
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Public health and environment 56 |
4. Good experience with health indicators: MDG 7 drinking-water and sanitation targets diarrhoea
Improved drinking-water: - World met target in 2010, but - 783 million still without improved water - 6% drinks from surface water
Sanitation: World unlikely to meet target - 2.5 billion without - 1.1 billion defecate in open
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Public health and environment 57 |
WHO Global Health Observatory
Data Base Tables & downloads
World Health Statistics (+MDG)
Burden of Disease
Country pages All data by country
Country profiles General, RO, Programs (15+) Indicators Customized data view
Repository Reports, data
Reports Analytical
World Health Statistics
Women & health
Burden of Disease
Program reports
Metadata
Indicator registry
Repository of country reports
Themes Core indicators (situation/trends) Map gallery Access to core information
MDG 1 2 4 5 6 8
World Health Situation
Other themes
Women & health
5. Health data is widely accessible
Program databases
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Public health and environment 58 |
Millennium Development Goals
(MDGs)
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Public health and environment 59 |
Next Generation of Development Goals
Goals and indicators influence our understanding of development, political agendas and resource transfers
• Global challenges requiring shared solutions (North and South)
• Synergistic - progress across economic, social, environmental and security pillars of sustainable development.
• Transforming patterns of production/consumption • Create transparency and accountability - process
consultative and deliberative
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Public health and environment 60 |
Member States
Intergovernmental
Open Working Group on SDGs (OWG)
Other
UN System
UNTT Technical Support Team on
SDGs
Thematic collaborations
Civil Society
Multi-stakeholder advisory group on
SDGs (MAG), TBC
Rio+20
Man
date
d fo
r the
SD
Gs
HLP and OWG reports
to 68th UNGA 2013/14
2010 MDG Summit
Member States
SG’s High Level
Panel of Eminent Persons
on Post-2015 Development
Agenda (HLP)
UN System
UN Task Team (UNTT)
Working Groups
UNDG MDG Task Force
Consultations
Civil Society
Sustainable
Development Solutions Network (SDSN) M
anda
ted
the
Post
-201
5 D
evel
opm
ent A
gend
a
Parallel, Intersecting Processes
Informal Coordination Group: DESA-ASG (Shamshad Akhtar), UNDG/UN Women-ASG (John Hendra), SG Special Advisor on Post-2015 (Amina Mohammed)
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Public health and environment 61 |
Next steps: Including Healthy Transport in the Local and Global Development Agendas
1. Better evidence of health co-benefits
• research methods, & tools
• Short term studies of BRT implementation and health in emerging economies
• Systematic review of science
2. Good indicators of health impacts of transport policy options to track performance of investments (local/global)
3. Cost-benefit analysis of UT/BRT includes health 4. WHO Guidelines for healthy transit/public transport
development. 5. Monitor & track health co-benefits of urban transport an
indicator of sustainable development goals (SDGs)
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Public health and environment 62 |
Thank you
Department of Public Health and Environment: http://www.who.int/phe/en/ Health in Green Economy
http://www.who.int/hia/green_economy/en/index.html
Photo credits:www.stillpictures.com;
www.hardrainproject.com; www.bigstock.com