GPS-styrd saltspridning: test på avlyst bana

Download
Staffan Möller

The purpose of the project is to test and document GPS controlled salt spreading on a test track by weighing ditributed salt quantities and compare with intended amounts of salt at different spreading amounts, spreading widths, symmetries, speeds and types of salt (pre wetted salt and brine). The test is to study how salt distribution is affected by changes in the road section both to the right and to the left of the through lane or the two through lanes. Such changes should imitate e.g. transition from two lanes to one on a 2 + 1 road or passing a refuge or a bus-bay. A test track was marked with tape. In order to measure the spread salt quantities plastic sheets, with the size 1.1 x 1.6 metre, were taped on the surfacing. Centered over the plastic sheets cloths of curtain fabric, with the size 1.0 x 1.5 metre, were placed. The cloths were held in place by chains. When a comparison is made between the salt distribution with and without GPS control of the salt spreader on two lanes and a bus-bay and on a transition from two lanes to one the following conclusions are drawn. Using pre wetted salt on two lanes and a bus-bay at 30 and 45 km/h the results with GPS control got better on the right lane. On the left lane the results were about the same. Both with and without GPS control small amounts of salt ended up on the bus-bay. Using brine on two lanes and a bus-bay at 40 and 65 km/hour the results on the right and left lane respectively were about the same with and without GPS. On the bus-bay the results with GPS got worse. Using pre wetted salt on a transition from two lanes to one at 30 and 45km/h the results with GPS control got worse on the right lane. On the left lane GPS control resulted in higher amounts of salt, but not better results, compared with without GPS. Using brine on a transition from two lanes to one at 40 and 65 km/hour the results with GPS control got better both on the right and the left lane.

MEET US


19-20
Oct

ERPUG 2017

The five year anniversary of  European Road Profile Users' Group (ERPUG) Forum will take place at Ramboll head quarter, Copenhagen, Denmark October 19-20, 2017. 

LATEST NEWS


2017-07-05

Vehicle Driver Monitoring: sleepiness and cognitive load

To prevent road crashes it is important to understand driver related contributing factors, which have been suggested to be the critical reason in 94 per cent of crashes. The overall aim of the project Vehicle Driver Monitoring has been to advance the...


2017-06-29

Tomas Svensson new director-general

Tomas Svensson was today appointed Director-General of VTI. Tomas has been acting Director-General since January 2017. 


2017-05-30

Crash testing bicycles at VTI

For the first time single bicycle crashes have been simulated at the VTI crash safety laboratory.


2017-05-15

A case study exploring firefighters’ and municipal officials’ preparedness for electrical vehicles

A VTI-study presents a social perspective on new vehicle technology. It explores the self-reported preparedness of the fire departments (i.e., rescue services) in Sweden’s three largest cities regarding rescue operations involving electrical vehicles (EVs).


2017-05-02

Pioneering research on and about bicycles at VTI

Under what circumstances might cyclists lose tyre grip? What actions could then be taken to prevent a crash? VTI is currently developing a theoretical model of the behaviour of bicycle tyres during braking and steering in different situations and on different...


2017-05-02

Virtual pedestrians create efficient stations

If more people are to choose sustainable travel, then the public transport stations of the future must be designed so that pedestrians can get where they are going quickly, without congestion or queues. The Swedish Road and Transport Research Institute (VTI)...