Comparative field evaluation of vehicle cruise speed and acceleration level impacts on hot stabilized emissions

El-Shawarby, Ihab; Ahn, Kyoungho; Rakha, Hesham

doi:10.1016/j.trd.2004.09.002

Cited by 118 publications

(60 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Reducing the speed limit to 60mph would almost double the saving to 1.88 mega-tonnes. Generally, though, it is thought that fuel efficiency is at its maximum between 60 and 80km/h, as this optimises the trade-off between overcoming rolling road resistance and increasing wind resistance (Andre and Hammarstrom, 2000;Haworth and Symmons, 2001;El-Shawarby et al, 2005).…”

Section: Green Drivingmentioning

confidence: 99%

“…Similarly, Johansson et al (2003) found certain characteristics of driving behaviour that were significantly correlated with good fuel economy, such as avoiding unnecessary stops, maintaining low deceleration levels, minimising the use of 1 st and 2 nd gears, increasing the use of 5 th gear, and block changing gears where possible. Exploiting abilities can use up to 60% more fuel than mild or normal acceleration levels (El-Shawarby et al, 2005). More specifically, Waters and Laker (1980) demonstrated that the optimal acceleration rate was 0.07g, with fuel consumption increasing by 20% as acceleration increased up to 1.8g.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Safe driving in a green world: A review of driver performance benchmarks and technologies to support ‘smart’ driving

2011

View full text Add to dashboard Cite

Road transport is a significant source of both safety and environmental concerns.With climate change and fuel prices increasingly prominent on social and political agendas, many drivers are turning their thoughts to fuelenvironmentally friendly) driving practices. Many vehicle manufacturers are satisfying this demand by offering green driving feedback or advice tools. However, there is a legitimate concern regarding the effects of such devices on road safety both from the point of view of change in driving styles, as well as potential distraction caused by the in-vehicle feedback. In this paper, we appraise the benchmarks for safe and green driving, concluding that whilst they largely overlap, there are some specific circumstances in which the goals are in conflict. We go on to review current and emerging in-vehicle information systems which purport to affect safe and/or green driving, and discuss some fundamental ergonomics principles for the design of such devices. The results of the review are being used in the Foot-LITE project, aimed at that is safe and green driving.

show abstract

Section: Green Drivingmentioning

confidence: 99%

mentioning

confidence: 99%

Safe driving in a green world: A review of driver performance benchmarks and technologies to support ‘smart’ driving

2011

View full text Add to dashboard Cite

show abstract

“…One of the golden rules of eco-driving is to avoid excessive acceleration events, reducing the need for high engine loads and helping to regulate a smooth driving style. A reduction in acceleration rates has been shown to be beneficial to both fuel economy and emissions (El-Shawarby et al, 2005;Ericsson et al, 2001;Waters and Laker, 1980). However 'Smart' driving encompasses both fuel efficient and safe driving behaviours, with acceleration rates also being independently linked to the risk of accidents (AAA Foundation, 2009;af Wahlberg, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the effect of aggressive driving on other vehicle emissions is more marked compared to CO 2 (and subsequently fuel economy), specifically when considering excessive acceleration levels. Research has suggested that aggressive driving styles increased hydrocarbon emissions by between 200 and 600%, and nitrous oxide by 50 to 200% (De Vlieger et al, 2000;El-Shawarby et al, 2005). These findings have led to the recommendations that to facilitate eco-driving throttle use should be 'positive' but not exceed a threshold of 50% (Johansson et al, 1999;van de Burgwal and Gense, 2002).…”

Section: Introductionmentioning

confidence: 99%

Vibrotactile pedals: provision of haptic feedback to support economical driving

2013

View full text Add to dashboard Cite

The use of haptic feedback is currently an underused modality in the driving environment, especially with respect to vehicle manufacturers. This exploratory study evaluates the effects of a vibrotactile (or haptic) accelerator pedal on car driving performance and perceived workload using a driving simulator. A stimulus was triggered when the driver exceeded a 50% throttle threshold, past which is deemed excessive for economical driving. Results showed significant decreases in mean acceleration values, and maximum and excess throttle use when the haptic pedal was active versus a baseline condition. As well as the positive changes to driver behaviour, subjective workload decreased when driving with the haptic pedal verses when drivers were simply asked to drive economically. The literature suggests that the haptic processing channel offers a largely untapped resource in the driving environment, and could provide information without overloading the other attentional resource pools used in driving.Keywords: Driving; haptic feedback; eco-driving; acceleration; vibrotactile; workload Statement of RelevanceOverloaded or distracted drivers present a real safety danger to themselves and others. Providing driving related feedback can improve performance but risks distracting them further, however giving such information through the underused haptic processing channel can provide the driver with critical information without overloading the driver's visual channel.

show abstract

“…Nam et al [143] and Zorrofi et al [144] stated that aggressive driving behavior and higher fuel emissions are strongly correlated. Aggressive driving wastes gas mileage by 33% at highway speeds and by 5% around town [99]. Rakha and Ding [95] stated the constant deceleration rates (−0.25 to −1.50 m/s 2 ) at increments of −0.25 m/s 2 reduced the amount of fuel consumption by about 0.09 L/km.…”

mentioning

confidence: 99%

Green Driver: Travel Behaviors Revisited on Fuel Saving and Less Emission

et al. 2018

View full text Add to dashboard Cite

Road transportation is the main energy consumer and major contributor of ever-increasing hazardous emissions. Transportation professionals have raised the idea of applying the green concept in various areas of transportation, including green highways, green vehicles and transit-oriented designs, to tackle the negative impact of road transportation. This research generated a new dimension called the green driver to remediate urgently the existing driving assessment models that have intensified emissions and energy consumption. In this regard, this study aimed to establish the green driver's behaviors related to fuel saving and emission reduction. The study has two phases. Phase one involves investigating the driving behaviors influencing fuel saving and emission reduction through a systematic literature review and content analysis, which identified twenty-one variables classified into four clusters. These clusters included the following: (i) FE f1 , which is driving style; (ii) FE f2 , which is driving behavior associated with vehicle transmission; (iii) FE f3 , which is driving behavior associated with road design and traffic rules; and (iv) FE f4 , which is driving behavior associated with vehicle operational characteristics. The second phase involves validating phase one findings by applying the Grounded Group Decision Making (GGDM) method. The results of GGDM have established seventeen green driving behaviors. The study conducted the Green Value (GV) analysis for each green behavior on fuel saving and emission reduction. The study found that aggressive driving (GV = 0.16) interferes with the association between fuel consumption, emission and driver's personalities. The research concludes that driver's personalities (including physical, psychological and psychosocial characteristics) have to be integrated for advanced in-vehicle driver assistance system and particularly, for green driving accreditation.

show abstract

Comparative field evaluation of vehicle cruise speed and acceleration level impacts on hot stabilized emissions

Cited by 118 publications

References 6 publications

Safe driving in a green world: A review of driver performance benchmarks and technologies to support ‘smart’ driving

Safe driving in a green world: A review of driver performance benchmarks and technologies to support ‘smart’ driving

Vibrotactile pedals: provision of haptic feedback to support economical driving

Green Driver: Travel Behaviors Revisited on Fuel Saving and Less Emission

Contact Info

Product

Resources

About