• Jens Kresten Nørgaard Madsen
  • Jens Kristian Duhn
In this report, a method for systematically identifying the congestion for the buses in Aalborg is put forward. In addition to this, it also aims to draw up the method in such a way, that it will become generally useful not only in Denmark, but also in other countries. In addition to this, suggestions for projects to reduce the congestion for buses in selected locations, identified by the method, will be constructed and assessed. By way of introduction the public transport system in Aalborg and the surrounding area are described, thus examining how the public transport system works in Aalborg. Subsequently some of the more general problems with public transport are introduced, where, among other things, declining number of passengers, and higher prices causes an adverse effect for the public transport. Likewise, some of the factors which have influence on the demand for public transport are described. These issues and factors are then made more specific in connection with a review of the trends of the public transport system in and around Aalborg. This study reveals that it is primarily the travel time, the reliability, the frequency and the price of using the public transport, which have an effect on whether people chose to travel by public transportation or not. By improving these conditions, it can be expected, that the downward tendency, which the public transport currently is suffering from, can be slowed down or even turned around. In accordance to this the focus in this report subsequently will be on the first two factors: travel time and reliability. In order to identify locations where these conditions can be improved, an analysis with the purpose of revealing where the buses are being delayed, causing extended travelling times and reduces reliability, will be carried out. In order to document and identify locations where the buses in Aalborg are being delayed, position logs through GPS is being used, which is gathered from Metrobus 1 and 2 over period of a month. From this data, travelling times between stops in peak hours in the morning and afternoon is being compared to travelling times in the evening, when the buses aren’t being delayed by other traffic. In this way it is calculated for how long the buses are being delayed between the stops in peak hours. To standardize the expressions for these delays, several levels of congestion are defined, so that delays in different stretches can be compared relatively. The purpose of the analysis is not only to identify the delays and congestion for the buses in Aalborg, but also to establish a standardized method for identifying congestion for buses in general, which can be utilized in other cities in Denmark and Europe. Since the data used to calculate and identify the congestion is generated according to a common European standard, the method can be applied directly in other cities, where the position of the buses is registered according to this standard. In addition to ensuring that the method is useful in general, it has also been the aim to ensure that the identification of congestion can be done with a few number of resources, and that the results can be presented in such a way, that they can be understood by non-professionals. This is ensured through standardized calculations, utilizing templates in Microsoft Excel and graphic presentation of the results on maps. From a comparison of locations with congestion, an area with heavy congestion problems, and where it is relatively uncomplicated to carry out measures to remedy these problems, is identified. In this report the stretch from the intersection between Sohngaardsholmsvej and Th. Sauers Vej to the University is selected, and two different projects with the aim of improving the pass ability of the buses is established. These projects are based on previous studies of ways to prioritize the public transport in the area. The projects consist of an independent busroad from Th. Sauers Vej under the motorway to the University, and an expansion of Th. Sauers Vej from two to four lanes, consequently causing a need to construct an independent bridge over the motorway for pedestrians and cyclists. These two projects are subsequently sketched out, to demonstrate that it is possible to implement the projects, and to provide a basis for calculating the build costs of the projects. These build costs are then used in a socio-economical analysis of the two projects, in order to calculate whether the projects are feasible from a socio-economical perspective, and which project that is the most feasible. The socio-economical analysis is a cost/benefit analysis, which calculates the difference in costs and benefits for the two projects, compared with a basis scenario, where neither of the projects is carried out. For this, the quantity of the traffic in the future is calculated, based upon the general increase in traffic and as a result of the comprehensive development in the areas surrounding the University. From this, changes in driving costs can be calculated. In order to estimate the changes in travel time costs, a traffic simulation for the different scenarios is layed out and from here, the travel times can be read. Based on the findings of the socio-economical analysis it can be concluded, that the most feasible project to reduce the travel times for the traffic in general is the projects with an expansion of Th. Sauers Vej from two to four lanes. However, if focus only is on the buses, the project with an independent busroad under the motorway provides the shortest travel times for the buses in peak hours. In addition to this a path for pedestrians and cyclist under the motorway is studied, but it is found that the savings generated by this are short-termed, and it is therefore not recommended to carry out this project.
Publication date2008
Number of pages166
Publishing institutionAalborg Universitet
Keywordsbuses, congestion, GPS
ID: 14438327