Boulevardisation as a tool to reduce barrier effects from transport infrastructure: a case study of the planned Dag Hammarskjöld boulevard
Typ
Examensarbete på kandidatnivå
Program
Publicerad
2022
Författare
Lindblad, Henrik
Nord, Arvid
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Dag Hammarskjöldsleden is a multi-lane freeway stretching from Linnéplatsen to the interchange
Jänrbrottsmotet in Gothenburg, Sweden. The city of Gothenburg wants to rebuild
it into a boulevard, with one of the purposes to reduce barrier effects, hence making it a
more attractive area to live in. Reduced accessibility and increased travel times to services
and workplaces are examples of direct barrier effects. Job van Eldijk has created a
conceptual model describing these barrier effects.
In this thesis, the suitability of boulevardisation of transport infrastructure as a means to
reduce barrier effects for pedestrians and cyclists is studied, using the Dag Hammarskjöld
boulevard project as a case study. A geographic model of the area around Dag Hammarskjöldsleden
was created with GIS and quantitative indicators were used to assess the
extent of barrier effects under different scenarios. Four scenarios were created with different
street networks, residential development and distribution of facilities: 0 - how the area
looks today, A - how the area would look with a boulevard design only, B - how the area
will look with the planned new urban development only, and C - how the area would look
with both the future urban development and a boulevard design, which also represents the
design the municipality proposes.
Five barrier effects indicators were calculated for each scenario: choice of a facility of
given category, facilities’ catchment area, proximity to a facility category, Betweenness, and
Detour factor. By comparing the indicator analyses for scenarios 0 & A, it can be concluded
that the boulevardisation of Dag Hammarskjöldsleden, without further urban development,
would have limited effect on the barrier effects, due to the lack of demand for crossing
the road today because of the absence of activities on the east side. The comparisons
between scenario B & C, which included increased urban development, indicates that the
boulevardisation would have a significant effect on the southern and middle sections of
the studied area. It is especially addition of new crossing facilities that improves the
accessibility in these areas, hence reducing the barrier effects.
Beskrivning
Ämne/nyckelord
barrier effect, spatial analysis, boulevard, GIS, indicators , impact assessment, scenario evaluation