Abstract
In the pursuit of promoting cycling and providing better cycling infrastructure, its design is of great importance. One of the critical locations in a network are intersections, and specifically T-junctions, due to the inverted perception of priority. In this paper, we investigate the behaviour at T-junctions dedicated to cyclists and the effect on bicycle flow efficiency resulting from the introduction of lane markings that advise through cyclists to shift to the left so that merging cyclists can occupy the space on the right hand side of the cycle path. A comprehensive framework is proposed for the assessment of the T-junction efficiency. Empirical trajectory data from a large-scale cycling experiment are used for the analyses. The findings suggest that cyclist heterogeneity can be even more influential on the efficiency than the infrastructure design. Moreover, a form of self-organisation is observed, as through cyclists are willing to move to the left and allow merging cyclists to fit in the cycle path without the provision of any instructions. This means that the lane marking is both redundant and not improving the efficiency of the T-junction.
Highlights
The increased interest and promotion of cycling by governments and municipalities throughout the world goes handin-hand with the provision of better cycling infrastructure
We focus on T-junctions dedicated to cyclists and investigate cyclist behaviour using empirical trajectory data collected during a large-scale cycling experiment [11]
We investigated the cyclist behaviour at T-junctions dedicated to bicycles and assessed the efficiency of the T-junction design on the bicycle flow
Summary
The increased interest and promotion of cycling by governments and municipalities throughout the world goes handin-hand with the provision of better cycling infrastructure The design of this infrastructure is of great importance, because it influences cyclist behaviour, as well as the attractiveness to use it. On the other hand, this higher risk may relate, among other things, to the presence of sharp turns and the lack of road marking or lighting [6]. Another cause might be the high number of interactions. A study in Amsterdam showed that when the number of cyclists at an intersection is high, the level of stress and discomfort of the cyclists rise, and they adhere less to traffic rules [7]
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