The Ecomobility is a cross-sectoral, global partnership, an environmentally friendly and socially inclusive way of transportation, seeking the promotion integration of cycling, walking, and passenging (Being a passenger in another's car or a carpool) [1], and wheeling (wheelchairs, non-motorized scooters, walking aids, skates, push scooters, trailer, hand carts, shopping carts/ trolleys, carrying aids) [2]. Although this research approaches the clean and green environment from the window of excluding the fossil-fuel motorized means of transportation, if there is still a necessity, passenging owns a pack of advantages over private cars. As a main passenging option, Carpooling has a lot of benefits to the environment, human health, and social lives, e.g., saving money, better for the environment, Convenience, etc.
1.1 Passenging
Passenging is defined as being a passenger in another’s car or carpooling, which shares the concept of increasing the efficiency of using such vehicles in carrying passengers. The concept becomes more apparent, listing the benefits of carpooling [3].
1.1.1 Saving money
This concept allows humans to share the cost of gas and parking, cutting expenses by nearly 50%; the more occupants in carpooling, the more saving, and is socially economical. Moreover, humans will also help reduce the costs of constructing new roads, their maintenance, and air pollution-related health costs.
1.1.2 Better environment
Fewer cars on roads mean reduced Greenhouse Gas (GHG) emissions and better air quality.
1.1.3 Better health
Air pollution caused by vehicular traveling is related to several health anxieties, including cardiovascular and respiratory diseases, allergies, and neurological effects. Using car-pooling helps reduce those health risks for a human being. On the other hand, carpooling is a great way to make new friends, which is psychologically healthier.
1.1.4 Convenience
Unlike driving alone, carpooling provides commuting Convenience, less stress, and added advantage of companionship while commuting. Also, this practice lets partners establish their own unique rules that best meet the desires of their carpool.
1.1.5 Better commuting options
Another option the carpooling offers a commuter, which may work better than other means of transportation; it works better for people living where transit service may be non-existent or limited.
1.2 Energy Efficiency
A study was performed in China to reduce GHG; the study claimed that China targeted the peak around 2030 [4]. However, it expected that the peak may come earlier than expected, which is reflected in the CO2 emission (from coal consumption and fossil fuels) to have its peak also before 2030. Another study evaluated the economic impacts of GHG emission reduction on the Brazilian economy reached that different sectoral targets may balance environmental benefits with the possible financial losses incurred by taxation policy or emission permits [5].
In parallel, the energy efficiency studies touched key triggers to reduce carbon emissions. An analytical study in China (2013) indicated that if greater intensity emission reduction measures were taken, the carbon emissions would reduce by 31.01 million tons by 2015 and 48.81 million tons by 2020 [6]. The previous results indicated the average reduction flow per time.
1.3 Partnership for Sustainable Urban Development
Saving the environment is cooperative work that requires sharing experiences with other partners worldwide. The cooperation between the Gulf region and China in the last half of the decade is an example of a global partnership. The Gulf region has achieved a success story, economically and socially. Following a smart investment arrangement of natural resources, the region has succeeded in attracting and retaining the international experience, therefore overcoming the discrepancy between its vast economy and small population-base lacking the instantly needed technical skills. The region has collected considerable wealth during the process, financially and else [7].
The primary purpose of Ecomobility, mentioned previously, is enhancing the opportunity for sustainable urban development. Also, it complies with John Elkington’s triple bottom line (TBL), or what is often referred to as the three “P’s”: people, planet, and prosperity [8]. Likewise, worldwide, large cities are applying guidelines to guarantee that environment, economics, and sociality are at the lead of urban design. The elevation of healthier streets has formed new chances for social and commercial interaction and more comprehensive outcomes [9]. Overall, it is the transformation of the earlier global Coalitions of Ecomobility that aims at engaging public and private sectors, promoting and advocating Ecomobility at a worldwide level in the Industrialized and developing countries.
1.4 Streets’ Design
A potential approach to fostering pedestrian Ecomobility is the streets’ design, which is a core focus of this research. Urban spaces are a vital city part, forming the basic structure of public life. Specific urban planning and design criteria make these spaces “quality public spaces” [10]. In this perspective, determining and evaluating these criteria will transform those public urban spaces into quality spaces. The last research adopted criteria that came to a head in the relevant reviews and were accepted by most researchers. Also, in the current research, the study chose following these criteria, since they are collected and validated by several researchers over decades (around 17 references; Table 1), and cover the possible aspects of successful streets; they will be presented and used in the next section (Methods).
Table 1
Respondents’ statistics (N = 257)
Main Characteristics | | Students (N = 174) | Faculty members (N = 55) | Staff (N = 28) |
Gender | Female | 91 (52.3%) | 27 (49%) | 9 (32.1%) |
Male | 83 (47.4%) | 28 (51%) | 19 (67.9%) |
Physical disability | No | 168 (96.6%) | 52 (94.5%) | 27 (96.4%) |
Maybe | 5 (2.9%) | 1 (1.8%) | 0 (0.0%) |
Yes | 1 (0.5%) | 2 (3.7%) | 1 (3.6%) |
Age | Less than 24 | 166 (95.4%) | 10 (18.2%) | 19 (67.9%) |
From 24 to 50 | 8 (4.6%) | 33 (60%) | 7 (25%) |
Over 50 | 0 (0.0%) | 12 (21.8%) | 2 (7.1%) |
Nationality | Saudi | 132 (75.9%) | 6 (10.9%) | 19 (67.9%) |
Non-Saudi | 42 (24.1%) | 49 (89.1%) | 9 (32.1%) |
Distance to the campus | Less than 1 km | 5 (2.9%) | 0 (0.0%) | 0 (0.0%) |
From 1 to 3 km | 18 (10.3%) | 7 (12.8%) | 1 (3.6%) |
From 5 to 8 km | 55 (31.6%) | 24 (43.6%) | 11 (39.3%) |
Longer than 10 km | 96 (55.2%) | 24 (43.6%) | 16 (57.1%) |
A noteworthy point is the gap between the municipal policies and the guidance provided to the street design decision-makers. A study across cities in the United States highlighted some issues regarding the mechanism of developing policies related, as they aim to challenge auto-centrical street design standards in favor of “complete streets,” which are safe for users of all abilities. Also, they address the demands of non-motorized street users and sustainable transportation. Moreover, those policies do not lead to the negotiation of tradeoff among users inside the street right-of-way; They are broad and defer to optimistic safety goals accommodating all user types equally without recognizing the accommodation’s implicit hierarchy [11].
Also, the transformative potential of experimentations proposed attaining “streets for people” rather than “streets for traffic” remains under-investigated. There is little to no comparative assessment of already present trials and no critical reflection on their explicit added value for systemic change. While street research aim to create basically diverse arrangements of urban mobility, their potential as triggers of a larger systemic change is blurred [12].
In the age of autonomous vehicles (AVs), a study reached that with the promise of Avs, which will use less street-right of way and uncouple parking from land uses in the cities; it is time to take back streets and make them serve people first, arranging cycling, walking, and transit. This action will take place precisely in the design process for livable streets. Also, it is time to act and make sure that designers and planners can get at the forefront of the rapidly changing technologies of vehicles [13].
Through medical and psychological professionals, the street design process had a different approach. Expert observers calculated street users for four streets, which differed in walkability according to the Irvine-Minnesota audit. From 7 am - 7 pm all days, the whole streets had significant quadratic trends of increasing followed by decreasing use. Furthermore, the two most walkable streets showed substantial linear increases in users across the day. Part of a street’s identity is its temporal activity rhythm, and both walkability and rhythms can report to urban design and restoration [14]. The study, through its test, searched what makes streets and neighborhoods walkable and found that more walkable streets had more users overall and linear increases in use starting from morning to early evening.
This paper focuses on Ecomobility in Riyadh city streets that promote the integration of passenging, cycling, wheeling, and walking. A previous study discussed the pedestrian mobility status in the same city, focusing on the transformation to sustainable mobility. That research case study was applied to the PSU community and argued that the current mobility is unsustainable, as it profoundly relies on privately-owned cars run with fossil fuel. It unveiled that a substantial percentage of the survey sample (72%) traveled by car from homes to the campus. However, the assessment results showed that the transformation to sustainable mobility is expected soon by launching the new mega projects related to public transportation like Riyadh Metro and busses, which is considered a key indicator to sustainable mobility [15].
Riyadh city in Saudi Arabia is a part of a hot-weather zone (almost seven months a year: April-October), as seen in Figure 1 [16]. As a result, studying the pedestrian thermal comfort affected by the street design is a core point. Almost similar conditions were present in a case study in the Australian North Melbourne (southeast) at street level for pedestrians (Subtropical Zone), as seen in Figure 2 [17]. That study assessed modeled existing and future scenarios for different street profiles and the consequences of microclimatic parameters and thermal comfort. The target was to assist urban planners in developing policies that can efficiently reduce the exposure to heat stress at the pedestrian level [18].
A comparison study was also applied to two gulf cities that share the hot weather: Dubai and Abu Dhabi. It compared the efficiency of the early suburbs and the newer ones to provide quick and direct access to destinations (connectivity). The study argued that better connectivity is required for usefulness in hot, dry regions. In this regard, it explored how the abandoned system of alleys could be cultivated to enhance connectivity efficiency [19].
In residential streets, developers' width is not a choice but somewhat a constraint enforced through planners' concluded subdivision standards. Residents can generally compromise by choosing smaller yards or homes in a swap for other facilities or a lower price, but they cannot select a smaller street [20].
Recently, in Riyadh city, a study highlighted that the rising fuel prices would create a positive atmosphere for implementing the complete streets’ concept, defined as streets’ design that can safely accommodate all transport modes for all society segments. It includes, but is not limited to, public transportation, humanizing neighborhoods, promoting walking as a healthy lifestyle [21].