Energieffektivitet hos beläggningar för tyngre trafik: En litteraturöversikt

Download
Annelie Carlson
Jonas Wennström

It is important to study traffic energy efficiency since small changes can have major effects over the road’s service life. Vehicle driving resistance was studied in this project and, in particular, its rolling resistance - the part of the driving resistance connected to the interaction between tyre and road surface. Depending on driving conditions and vehicle type, the rolling resistance corresponds to 5–40 percent of the total driving resistance.

It has been observed in studies that road surface properties such as texture (Mean Profile Depth, MPD) and unevenness (International Roughness Index, IRI) have an impact on rolling resistance. However, the significance varies between different analyses. The variation in the results may be due to difficulties in performing comparable tests and that it is often difficult to isolate the effect of texture and unevenness during the tests. In addition, pavement stiffness and deflection may also have an effect on rolling resistance. However, the impact from these parameters is unclear.

The higher the driving resistance of a vehicle, the higher the energy needed. Earlier studies examined how vehicle fuel consumption varied between driving on concrete roads and asphalt roads. Although several of these studies showed a lower fuel consumption when driving on concrete roads, most of them did not consider the pavement surface characteristics. This is a significant shortcoming because pavement surface characteristics can have a considerable effect on rolling resistance.

Reducing rolling resistance on high-traffic volume roads will lead to greater fuel savings. However, these measures need to be weighed against the amount of energy needed to achieve a lower rolling resistance. Compared case studies also show that it is often beneficial to invest more energy on the maintenance measure itself if it can lead to a lower rolling resistance, compared to a less comprehensive maintenance measure leading to a higher rolling resistance.

MEET US


25-27
Aug

ICTTP 2020

ICTTP, International Conference on Traffic and Transport Psychology, is postponed until August 2021.
13-14
Oct

Society for Benefit-Cost Analysis: European Conference 2020

VTI and Centre for Transport Studies (CTS) at Royal Institute of Technology (KTH) organise Society for Benefit-Cost Analysis: European Conference 2020. 
4-6
Nov

International Cycling Safety Conference

Swedish Cycling Research Centre, Cykelcentrum, organises together with Lund University the International Cycling Safety Conference, ICSC, in Lund 4-6 November 2020.

LATEST NEWS


2020-05-25

Unique knowledge compilation on microplastics from road traffic

Although we know that tyre and road surface wear generates significant emissions of microplastic particles, knowledge about them is very limited. This is the conclusion of a report issued by the Swedish National Road and Transport Research Institute (VTI).


2020-05-25

Measures for infrastructure climate adaptation requires prioritisation

The effect of climate change will result in more extreme weather events causing for example increased risk of floods, and landslides, which will result in great costs to society. Therefore, society needs to prepare for the consequences brought on by climate...


2020-04-16

Increased interest in train simulators

VTI has developed a train simulator that has become a valued tool in train driver education and research on how simulators can be used to improve railway technology.


2020-04-06

Self-driving Buses in Linköping Part of the EU Project SHOW

The benefits of self-driving vehicles for people with disabilities are one of the focus area for a recently launched EU project linked to self-driving buses in Linköping, Sweden.


2020-04-02

Young people's travel habits are important for the transition of the transport system

The transport system is facing a number of challenges due to its negative impact in areas such as the climate, equality and fairness. In a recent report, researchers highlight the voices of young people to get their thoughts on the field of transport.


2020-03-25

Connected vehicles solve parking problems

Vehicles circulating in the city centre in search of a free parking space is a growing problem. A cloud service that tracks the traffic situation and the availability of free parking spaces could reduce both traffic and congestion.