Upplevelser och effekter av bredare vägrenar, gupp och refuger för oskyddade trafikanter: På landsvägar genom Ullatti, Bondersbyn och Ersnäs
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Annually, many requests are sent to Trafikverket (Swedish Transport Administration) which includes residents who want improvements along streets and roads. Of the requests that affect villages located along the rural roads, many concerns inhabitants of these villages who request separate pedestrian and cycle routes through the village. The reason of this being that the road is the only means for vulnerable road users to reach destinations within the village. One measure that Trafikverket is able to take with reasonable speed and cost are wider verges. This will increase the space for vulnerable road user and narrow the roadway for road traffic which in turn leads to decreased speed for passing vehicles. There´s a lack of clear guidelines and recommendations about wider verges and were they are suitable. The purpose of this study is to present recommendations and guidelines for planning of roads through villages, especially when and were wider verges are desirable. The study is primarily dedicated to traffic safety and the vulnerable road users’ experience of wider verges on rural roads. To fulfil the purpose of the study three different roads and villages in Norrbotten were studied. The villages in which the roads are located are Ullatti, Bondersbyn and Ersnäs. The limitation of the study was the part of the roads with a maximum speed of 50 kmph. The studied roads have wider verges than normal with a width of 1 m. The width is experienced as a good width for pedestrians. On country roads as a general, 1 m verges is recommended for roads with a total width of 6.5-7 meters. For wider roads, even wider verges can be considered. Further was the experience of the traffic safety from the vulnerable road users’ point of view studied. The main focus of the study was wider verges but bumps and refuge were also a part of the study. Two site visits with careful observations were made. The first visit was in March during winter conditions and the second during the summer. On the later of the two site visits the roads were measured. To further analyze the result of the observations the inhabitants of the villages answered two written surveys about how they experienced the roads during both winter and summer conditions. To broaden the knowledge of measures to improve safety for vulnerable road users’ a study of previous literature of the subject was conducted. The main focus of this study is wider vergers, but the result from the surveys is that the main problems is the refuges. The respondents of the surveys did also put more focus on the bumps and refuges than they did n the widened verge. As a result bumps and refuges were added to the study. It also turned out that there is a lack of knowledge about laws and traffic rules with the residents of the villages. An increased knowledge could lead to a better understanding and increased safety with the residents. The result of the surveys also shows that it takes more work with the road carrier companies to ensure that drivers of trucks is driving more carefully and doesn’t exceed the speed limits. According to the respondents the drivers of trucks shows lack of respect and act carelessly with not lowering the speed. In some situations that also makes vulnerable road users as well as other road users to feel unsafe. The result of this study is that there are various parameters that determine whether a wider verge is a good measure. Among other things, it has been shown that the road environment and the surrounding environment have a significant impact on road safety for unprotected road users as it affects the speed of passing vehicles. It has also been shown that wider verges alone cannot bring down the speed of passing vehicles without requiring any form of traffic calming supplement to reduce the speed. In some cases, the road environment as such complements on the locations where the road environment clearly suggest that motorists more or less automatically reduce speed. In other cases, the complement of wider verges consists of a physical barrier or another physical measure such as bumps or refuges, or different forms of ITS solutions (Intelligent Transportation Systems) or ATC (Automatic Traffic Safety Control also called speed cameras). In Ullatti wider verges are the best alternative since residences is close to the road and the road is wending through the village, which provides a feeling of safety and coherence. This will in turn sends a signal that the road can harbour a variety of road users. Vulnerable road users are also allowed in a more natural way on this road which means that the speed of the vehicles automatically is lowered, even lower than the allowed speed limit. The environment of the road and the painted verges is coherent. The result also shows that there is a need for further research and more studies on how vulnerable users experience traffic safety in rural areas.
Place, publisher, year, edition, pages
2014. , 248 p.
Teknik, Bredare vägrenar, vägrenar, gupp, refuger, oskyddade trafikanter, säkrare trafikmiljö, trafikmiljö, hastighetsdämpande åtgärder, vägmiljö, förbättringsåtgärd, landsvägar
IdentifiersURN: urn:nbn:se:ltu:diva-53285Local ID: a506d62e-3735-4c98-9b68-f981ab57aa8cOAI: oai:DiVA.org:ltu-53285DiVA: diva2:1026659
Subject / course
Student thesis, at least 30 credits
Architectural Engineering, master's level
Johansson, CharlottaWallström, Anna
Validerat; 20140711 (global_studentproject_submitter)2016-10-042016-10-04Bibliographically approved