Managing Traffic Flows for Cleaner Cities: The Role of Green Navigation Systems

Perez-Prada, Fiamma; Monzón, Andrés; Valdés, Cristina

doi:10.3390/en10060791

Cited by 14 publications

(8 citation statements)

References 48 publications

(63 reference statements)

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“…Table 6 shows the advantages and disadvantages of choosing different itineraries. These results obtained for a small city (Caceres) are similar to those obtained in a large city such as Madrid [38].…”

Section: Discussionsupporting

confidence: 84%

“…As for air pollution, pollutant emissions were reduced on urban routes by 35% on average. This result was higher than the savings reached in other green driving experiments, where in situations without important congestion levels, there were reductions of 13.8% and 20% [38,39]. However, if there is very high congestion, air pollutants could increase a lot, as reported by Bandeira et al [15] for CO (150%) and NOx (46%).…”

Section: Discussionmentioning

confidence: 65%

“…A problem may arise if all drivers used the urban routes, which would lead to increased congestion. Future research should model these effects as done in big cities [38,41]. Moreover, how emissions are dispersed and how citizens inhale emitted pollutants would be highly important research.…”

Section: Policy Recommendation and Future Researchmentioning

confidence: 99%

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Environmental Strategies for Selecting Eco-Routing in a Small City

et al. 2019

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This research aims to find the most ecological itineraries for urban mobility in a small city (eco-routes), where distances are rather short, but car dependence is really high. A real life citywide survey was carried out in the city of Caceres (Spain) with almost 100,000 inhabitants. Research was done on alternating routes, traffic, times of day, and weather conditions. The output of the study was to assess fuel consumption, CO 2 , and regulated pollutant emissions for different type of vehicles, routes, and drivers. The results show that in the case studied, urban roads had fewer emissions (CO 2 and pollutants) but there was an increase in the population affected by pollutants. On the contrary, bypasses reduced travel time and congestion but increased fuel consumption and emissions. Traffic conditions had a greater influence on fuel consumption in petrol vehicles than diesel ones. Therefore, there must be a balanced distribution of traffic in order to minimize congestion, and at the same time to reduce emissions and the number of people affected by harmful pollution levels. There should be a combination of regulatory measures in traffic policies in order to achieve that balance by controlling access to city centres, limiting parking spaces, pedestrianization, and lowering traffic speeds in sensitive areas.

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 65%

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Environmental Strategies for Selecting Eco-Routing in a Small City

et al. 2019

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“…In line with this result, Kono et al [28] estimate that eco-route practice can reduce emissions by around 9% while increasing travel times by another 9%. Perez-Prada et al [29] evaluated the impacts of different percentages of eco-routing drivers on traffic, CO 2 , and NO x in the entire Madrid Region. The results showed reductions of up to 10.4% in CO 2 and 13.8% in NO x in congested traffic conditions with a 90% penetration of green drivers; however, the population's exposure to NO x increased by up to 20.2% as the results of eco-routing drivers choose a shorter route that has a higher population density.…”

Section: Eco-routingmentioning

confidence: 99%

Green Eco-Driving Effects in Non-Congested Cities

et al. 2017

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Despite technological advances in engines and fuels, the transportation sector is still one of the largest emitters of greenhouse gas (GHG). Driving patterns, including eco-driving techniques, are a complementary measure for saving GHG emissions. Most eco-driving studies so far have been conducted in large cities suffering chronic congestion problems. The aim of this research is therefore to analyse the potential of driver behaviour for reducing emissions in a small non-congested city. Driver performance parameters such as travel speeds, number of stops, revolutions per minute, and maximum acceleration-deceleration are also studied. The methodology is designed to measure the effect of both eco-driving and eco-routing under real traffic conditions. A campaign was carried out in the city of Caceres (Spain) to collect data on various types of roads under different traffic conditions. This research concludes that eco-driving leads to CO 2 savings on all routes and road types of 17% in gasoline engines and 21% in diesel, although travel times are increased by 7.5% on average. The shortest route is also the most ecological, regardless of the traffic volume and characteristics, implying that consumption in non-congested cities depends mainly on distance travelled rather than driving patterns in terms of number of stops, speed and acceleration.

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“…Beyond the aforementioned four papers, there are also other interesting relevant studies that we have found and reviewed. For instance, the study in [16] (corresponding to Class II) conducts a thorough assessment of the impact of green navigation systems in a city's traffic flows, combining a macroscopic traffic model with a macroscopic emissions model and a GIS. Results show up to 10.4% reductions in CO 2 and up to 13.8% in NO x in congested traffic conditions for a 90% penetration of green drivers, but also that the overall population's exposure to NO x increases up to 20.2%.…”

Section: Related Workmentioning

confidence: 99%

Statistical Validation of Energy Efficiency Improvements through Analysis of Experimental Field Data: A Guide to Good Practice

Demestichas

Adamopoulou

2020

Vehicles

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Often in the area of road transport solutions and intelligent transport systems, two or more alternative solutions or methods compete in terms of energy gains, time efficiency, or other aspects. Measurements collected from field trials are used to make a comparative assessment but are usually limited because of resource constraints. The present paper describes how statistical inference techniques can be used in a systematic way, in order to validate the superior performance of one method over the other. We adopt such an approach to study the performance of two alternative routing methods in terms of achievable energy savings, although the same methodology can be widely applied to other use cases as well. We specifically employ and describe three different techniques to achieve the intended comparison, namely paired sample tests, statistical testing of mean value in a normal population, and two-sample tests in normal populations with unknown yet equal variances. We reach conclusions on whether claims of outperformance of one routing method over the other can be supported by our collected experimental data and to what extent.

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Managing Traffic Flows for Cleaner Cities: The Role of Green Navigation Systems

Cited by 14 publications

References 48 publications

Environmental Strategies for Selecting Eco-Routing in a Small City

Environmental Strategies for Selecting Eco-Routing in a Small City

Green Eco-Driving Effects in Non-Congested Cities

Statistical Validation of Energy Efficiency Improvements through Analysis of Experimental Field Data: A Guide to Good Practice

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