How much do we value improvements on the accessibility to public transport for people with reduced mobility or disability?
Introduction
Transport systems are used daily by people all over the world to reach different places in order to work, study or go shopping, enabling them to move around the city and be part of a community. This should be a right for every citizen, regardless of their physical and/or socioeconomic condition. Nevertheless, this is not true in developing countries where people with reduced mobility experience several difficulties while commuting.
Moreover, people with disabilities are frequently identified as one group that suffers major social exclusion because of their reduced mobility (Aarhaug & Elvebakk, 2015; Alsnih & Hensher, 2003; Barnes & Mercer, 2005) and the problems they face with public transport is one of the most relevant causes of that exclusion (Aarhaug & Elvebakk, 2015; Kenyon, Lyons, & Rafferty, 2002; Stanley et al., 2011). A transport system that does not allow them to travel comfortably and quickly is a system that reduces their participation in society. This attempts against their inclusion and do not allow them to develop correctly and to be included in society (Tyler, 2015).
Based on the above, improving the accessibility of public transport for users with reduced mobility (RM) becomes an important goal, especially in a developing country's context where social exclusion is an issue. Thus, a city's transport system should aim at a Universal Design that can provide accessibility and independence to the greatest number of people possible. However, in Chile, transportation projects that include elements of Universal Design currently do not have a formal valuation methodology to incorporate this type of social benefits, so they are usually disregarded as less socially profitable.
Therefore, the main objective of this research is to obtain the valuation of people for improving the accessibility of their urban bus system in a developing country context (Chile), by incorporating different elements of Universal Design through a stated preference experiment. As far as the authors know, there are no similar investigations in developing countries nor in Chile. The experiment considered three accessibility elements: audio-visual information at bus stops, elevation of stops and buses' access ramps.
While is true that Transantiago, the public transport system of Santiago (Chile), has made some progress in carrying people with reduced mobility (RM) over the past decade, much remains to be improved. A study from 2012 showed that in Transantiago about 80% of the bus stops and 23% of the bus fleet did not have elements of accessibility (DTPM, 2012), such as access ramps, guiding floor or handrails.
These deficiencies require even more attention if we consider that nowadays disability is not defined as the impediments that an individual faces as result of a disease, but rather corresponds to a complex interaction between individual capacities and environmental factors (Lid & Solvang, 2016). In addition, there is a notorious aging trend among the Chilean population: according to projections by the Chilean National Institute of Statistics, by the year 2020, about 11.9% of the Chilean population will be senior citizens (over 65 years), while by 2050 this proportion is expected to increase to 21.6%. This implies an increase in elderly passengers, who usually present illnesses that hinder their mobility (Karekla, Fujiyama, & Tyler, 2011).
Although other authors have valued elements of universal design in the transport system (Wardman, Hine, & Stradling, 2001; Maynard, 2007; Odeck, Hagen, & Fearnley, 2010; and; Karekla et al., 2011), these valuations have been undertaken in developed countries. As shown in Table 1, the elements of Universal Design more frequently valued are: information at bus stops, improved boarding, shelter facilities at bus stops, seats at bus stops, and light at bus stops. On the other hand, Fearnley, Flügel, and Ramjerdi (2011) comprehensively document passengers' valuations of Universal Design measures in public transport.
Based on the Norwegian experience, Odeck et al. (2010) propose a cost-benefit analysis of universal design measures based on the increase of patronage due to the specific measure and cost of the measure. Also, they identified the different types of benefits and costs related to each measure, proposing to value the benefits thorough a complete valuation study tailored for Norway.
This paper is structured as follows: Section 2 explains briefly the modelling framework, while Section 3 describes the methodology, deepening the survey's elaboration and its characteristics. Section 4 shows the main results, focusing in the differences between people with or without RM and with a concise analysis of the results. Finally, Section 5 presents the conclusions and future research lines.
Section snippets
Modelling framework
The theory underlying this study is broadly reviewed in this section, focusing on discrete choice models, valuation of attributes and use of stated preferences for similar purposes.
Survey design
In this section, we describe the survey design. Particularly, we describe how the elements were selected, the characteristics of the survey, and the models to be estimated.
Results
The survey sample (Fig. 3) corresponds to 497 men (37%) and 859 women (63%). The average age is approximately 28 years, mostly young adults between 18 and 29 years (73%). In terms of income, most respondents (37%) tend to have a relatively high income (about US$2,3981). When modelling, each observation was weighted by a correction factor to guarantee representability in terms age and income, to match the national distributions. This is a clear issue when conducting online
Conclusions
This paper detailed the design, development and application of a SP survey to obtain the willingness to pay of people in Santiago for improving the accessibility of their urban bus system. In SP surveys, the selection of the elements and the design of the survey are undoubtedly processes that requires continuous evaluation and re-elaboration, to obtain a useful and clear final instrument that achieves, in the most realistic possible way, the preferences of people. In this study, based on
Acknowledgements
The authors would like to thank professor Juan de Dios Ortúzar for his comments in the elaboration of our survey. The authors are also grateful for all the advice given by Ciudad Accesible, PIANE UC, and Fundación 360° regarding Universal Design, inclusive language and the special tool implemented in the survey for people with visual impairment. This research had the support of the Center for Sustainable Urban Development (CEDEUS, CONICYT/FONDAP 15110020), the BRT + Centre of Excellence funded
References (29)
- et al.
The impact of Universally accessible public transport – a before and after study
Transport Policy
(2015) - et al.
The mobility and accessibility expectations of seniors in an aging population
Transportation Research Part A
(2003) - et al.
Confidence intervals to bound the value of time
Transportation Research Part E
(2001) - et al.
Effective ways to grow urban bus markets–a synthesis of evidence
Journal of Transport Geography
(2008) - et al.
Passengers' valuations of universal design measures in public transport
Research in Transportation Business & Management
(2011) - et al.
Valuing noise level reductions in residential location context
Transportation Research Part D
(2005) - et al.
Using images to measure qualitative attributes of public spaces through SP surveys
Transportation Research Procedia
(2015) - et al.
Evaluating accessibility enhancements to public transport including indirect as well as direct benefits
Research in Transportation Business & Management
(2011) - et al.
Transport and social exclusion: Investigating the possibility of promoting inclusion through virtual mobility
Journal of Transport Geography
(2002) - et al.
Dis)ability and the experience of accessibility in the urban environment
ALTER- European Journal of Disability Research
(2016)